diff --git a/app/build.gradle b/app/build.gradle
index c5cf1b8..6320ea9 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -8,13 +8,13 @@ kotlin {
 }
 
 android {
-    compileSdk 34
+    compileSdk 36
     namespace "otus.gpb.homework.fragments"
 
     defaultConfig {
         applicationId "otus.gpb.homework.fragments"
         minSdk 26
-        targetSdk 34
+        targetSdk 36
         versionCode 1
         versionName "1.0"
 
@@ -27,6 +27,9 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
+    buildFeatures {
+        viewBinding = true
+    }
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_17
         targetCompatibility JavaVersion.VERSION_17
@@ -45,4 +48,5 @@ dependencies {
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.3'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
+    implementation 'androidx.activity:activity:1.10.1'
 }
\ No newline at end of file
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 9604b34..c7be1f4 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -21,6 +21,12 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <activity
+            android:name=".ActivityB"
+            android:exported="false" />
+        <activity
+            android:name=".ActivityA"
+            android:exported="false" />
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/otus/gpb/homework/fragments/ActivityA.kt b/app/src/main/java/otus/gpb/homework/fragments/ActivityA.kt
new file mode 100644
index 0000000..bc5e8bb
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/ActivityA.kt
@@ -0,0 +1,32 @@
+package otus.gpb.homework.fragments
+
+import android.content.Context
+import android.content.Intent
+import android.os.Bundle
+import androidx.activity.enableEdgeToEdge
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
+
+class ActivityA : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+            super.onCreate(savedInstanceState)
+            enableEdgeToEdge()
+            setContentView(R.layout.activity_a)
+            ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.containerA)) { v, insets ->
+                val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
+                v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
+                insets
+            }
+            if (savedInstanceState == null) {
+                supportFragmentManager.beginTransaction()
+                    .replace(R.id.containerA, FragmentA.newInstance())
+                    .commit()
+            }
+    }
+    companion object {
+            fun newIntent(context: Context): Intent {
+                return Intent(context, ActivityA::class.java)
+            }
+       }
+}
diff --git a/app/src/main/java/otus/gpb/homework/fragments/ActivityB.kt b/app/src/main/java/otus/gpb/homework/fragments/ActivityB.kt
new file mode 100644
index 0000000..39b8cba
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/ActivityB.kt
@@ -0,0 +1,33 @@
+package otus.gpb.homework.fragments
+
+import android.content.Context
+import android.content.Intent
+import android.os.Bundle
+import androidx.activity.enableEdgeToEdge
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
+
+class ActivityB : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContentView(R.layout.activity_b)
+        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.container_b)) { v, insets ->
+            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
+            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
+            insets
+        }
+        if (savedInstanceState == null){
+            supportFragmentManager.beginTransaction()
+                .replace(R.id.container_b, FragmentB.newInstance())
+                .commit()
+        }
+    }
+
+    companion object {
+        fun newIntent(context: Context): Intent {
+            return Intent(context, ActivityB::class.java)
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/otus/gpb/homework/fragments/FragmentA.kt b/app/src/main/java/otus/gpb/homework/fragments/FragmentA.kt
new file mode 100644
index 0000000..aef7e19
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/FragmentA.kt
@@ -0,0 +1,55 @@
+package otus.gpb.homework.fragments
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.activity.OnBackPressedCallback
+import androidx.fragment.app.Fragment
+import otus.gpb.homework.fragments.databinding.FragmentABinding
+
+class FragmentA : Fragment() {
+
+    private var _binding: FragmentABinding? = null
+    private val binding: FragmentABinding
+        get() = _binding ?: throw RuntimeException("FragmentABinding == null")
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View {
+        _binding = FragmentABinding.inflate(inflater, container, false)
+        return binding.root
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        requireActivity().onBackPressedDispatcher.addCallback(viewLifecycleOwner, object : OnBackPressedCallback(true){
+            override fun handleOnBackPressed() {
+                if (childFragmentManager.backStackEntryCount <= 0){
+                    requireActivity().finish()
+                } else {
+                    childFragmentManager.popBackStack()
+                }
+            }
+        })
+        binding.buttonFragmentAA.setOnClickListener(){
+            childFragmentManager.popBackStack()
+            childFragmentManager.beginTransaction()
+                .replace(R.id.containerFragmentA, FragmentAA.newInstance(ColorGenerator.generateColor()))
+                .addToBackStack(null)
+                .commit()
+        }
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
+    }
+
+    companion object {
+        fun newInstance(): FragmentA{
+            return FragmentA()
+        }
+    }
+}
diff --git a/app/src/main/java/otus/gpb/homework/fragments/FragmentAA.kt b/app/src/main/java/otus/gpb/homework/fragments/FragmentAA.kt
new file mode 100644
index 0000000..5667b6f
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/FragmentAA.kt
@@ -0,0 +1,55 @@
+package otus.gpb.homework.fragments
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.fragment.app.Fragment
+import otus.gpb.homework.fragments.databinding.FragmentAABinding
+
+class FragmentAA : Fragment() {
+    private var _binding: FragmentAABinding? = null
+    private val binding: FragmentAABinding
+        get() = _binding ?: throw RuntimeException("FragmentAABinding == null")
+    private var colorInt: Int? = 0
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        colorInt = arguments?.getInt(COLOR)
+    }
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View {
+        _binding = FragmentAABinding.inflate(inflater, container, false)
+        return binding.root
+    }
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        binding.buttonFragmentAB.setOnClickListener(){
+            parentFragmentManager.beginTransaction()
+                .replace(R.id.containerFragmentA, FragmentAB.newInstance(ColorGenerator.generateColor()))
+                .addToBackStack(null)
+                .commit()
+        }
+        colorInt?.let {
+            binding.layoutFragmentAA.setBackgroundColor(it)
+        }
+    }
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
+    }
+    companion object {
+
+        private const val COLOR = "color"
+
+        fun newInstance(color: Int): FragmentAA {
+            return FragmentAA().apply {
+                arguments = Bundle().apply {
+                    putInt(COLOR, color)
+                }
+            }
+        }
+    }
+}
diff --git a/app/src/main/java/otus/gpb/homework/fragments/FragmentAB.kt b/app/src/main/java/otus/gpb/homework/fragments/FragmentAB.kt
new file mode 100644
index 0000000..7825edb
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/FragmentAB.kt
@@ -0,0 +1,47 @@
+package otus.gpb.homework.fragments
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.fragment.app.Fragment
+import otus.gpb.homework.fragments.databinding.FragmentABBinding
+
+class FragmentAB : Fragment() {
+    private var _binding: FragmentABBinding? = null
+    private val binding: FragmentABBinding
+        get() = _binding ?: throw RuntimeException("FragmentAABinding == null")
+    private var colorInt: Int? = 0
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        colorInt = arguments?.getInt(COLOR)
+    }
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View {
+        _binding = FragmentABBinding.inflate(inflater, container, false)
+        return binding.root
+    }
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        colorInt?.let {
+            binding.layoutFragmentAB.setBackgroundColor(it)
+        }
+    }
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
+    }
+    companion object {
+        private const val COLOR = "color"
+        fun newInstance(color: Int): FragmentAB {
+            return FragmentAB().apply {
+                arguments = Bundle().apply {
+                    putInt(COLOR, color)
+                }
+            }
+        }
+    }
+}
diff --git a/app/src/main/java/otus/gpb/homework/fragments/FragmentB.kt b/app/src/main/java/otus/gpb/homework/fragments/FragmentB.kt
new file mode 100644
index 0000000..7ab38f1
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/FragmentB.kt
@@ -0,0 +1,52 @@
+package otus.gpb.homework.fragments
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.fragment.app.Fragment
+import otus.gpb.homework.fragments.databinding.FragmentBBinding
+
+class FragmentB : Fragment() {
+
+    private var _binding: FragmentBBinding? = null
+    private val binding: FragmentBBinding
+        get() = _binding ?: throw RuntimeException("FragmentAABinding == null")
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View {
+        _binding = FragmentBBinding.inflate(inflater, container, false)
+        return binding.root
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        if (binding.containerFragmentB == null) {
+            childFragmentManager.beginTransaction()
+                .replace(R.id.containerFragmentBA, FragmentBA.newInstance())
+                .commit()
+            childFragmentManager.beginTransaction()
+                .replace(R.id.containerFragmentBB, FragmentBB.newInstance())
+                .commit()
+        } else {
+            childFragmentManager.beginTransaction()
+                .replace(R.id.containerFragmentB, FragmentBA.newInstance())
+                .addToBackStack(null)
+                .commit()
+        }
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
+    }
+
+    companion object {
+
+        fun newInstance(): FragmentB{
+            return FragmentB()
+        }
+    }
+}
diff --git a/app/src/main/java/otus/gpb/homework/fragments/FragmentBA.kt b/app/src/main/java/otus/gpb/homework/fragments/FragmentBA.kt
new file mode 100644
index 0000000..3948803
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/FragmentBA.kt
@@ -0,0 +1,51 @@
+package otus.gpb.homework.fragments
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.fragment.app.Fragment
+import otus.gpb.homework.fragments.databinding.FragmentBABinding
+
+class FragmentBA : Fragment() {
+
+    private var _binding: FragmentBABinding? = null
+    private val binding: FragmentBABinding
+        get() = _binding ?: throw RuntimeException("FragmentAABinding == null")
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View {
+        _binding = FragmentBABinding.inflate(inflater, container, false)
+        return binding.root
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        parentFragmentManager.setFragmentResultListener(FragmentBB.KEY_BB, this){ key, bundle ->
+            val color = bundle.getInt(FragmentBB.BK_COLOR)
+            binding.layoutFragmentBA.setBackgroundColor(color)
+        }
+        if(binding.buttonFragmentBB != null){
+            binding.buttonFragmentBB?.setOnClickListener(){
+                parentFragmentManager.beginTransaction()
+                    .replace(R.id.containerFragmentB, FragmentBB.newInstance())
+                    .addToBackStack(null)
+                    .commit()
+            }
+        }
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
+    }
+
+    companion object {
+
+        fun newInstance(): FragmentBA{
+            return FragmentBA()
+        }
+    }
+}
diff --git a/app/src/main/java/otus/gpb/homework/fragments/FragmentBB.kt b/app/src/main/java/otus/gpb/homework/fragments/FragmentBB.kt
new file mode 100644
index 0000000..1fdc93e
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/FragmentBB.kt
@@ -0,0 +1,47 @@
+package otus.gpb.homework.fragments
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.core.os.bundleOf
+import androidx.fragment.app.Fragment
+import otus.gpb.homework.fragments.databinding.FragmentBBBinding
+
+class FragmentBB : Fragment() {
+    private var _binding: FragmentBBBinding? = null
+    private val binding: FragmentBBBinding
+        get() = _binding ?: throw RuntimeException("FragmentAABinding == null")
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View {
+        _binding = FragmentBBBinding.inflate(inflater, container, false)
+        return binding.root
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        binding.buttonSendColor.setOnClickListener(){
+            parentFragmentManager.popBackStack()
+            parentFragmentManager.setFragmentResult(
+                KEY_BB,
+                bundleOf(BK_COLOR to ColorGenerator.generateColor())
+            )
+        }
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
+    }
+
+    companion object {
+        val KEY_BB = "request_key_bb"
+        val BK_COLOR = "color"
+        fun newInstance(): FragmentBB{
+            return FragmentBB()
+        }
+    }
+}
diff --git a/app/src/main/java/otus/gpb/homework/fragments/MainActivity.kt b/app/src/main/java/otus/gpb/homework/fragments/MainActivity.kt
index 5e89c44..b4620fc 100644
--- a/app/src/main/java/otus/gpb/homework/fragments/MainActivity.kt
+++ b/app/src/main/java/otus/gpb/homework/fragments/MainActivity.kt
@@ -2,11 +2,23 @@ package otus.gpb.homework.fragments
 
 import android.os.Bundle
 import androidx.appcompat.app.AppCompatActivity
+import otus.gpb.homework.fragments.databinding.ActivityMainBinding
 
 class MainActivity : AppCompatActivity() {
 
+    private lateinit var binding : ActivityMainBinding
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_main)
+        binding = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+        binding.activityA.setOnClickListener(){
+            val intent = ActivityA.newIntent(this)
+            startActivity(intent)
+        }
+        binding.activityB.setOnClickListener(){
+            val intent = ActivityB.newIntent(this)
+            startActivity(intent)
+        }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/res/layout-land/fragment_b.xml b/app/src/main/res/layout-land/fragment_b.xml
new file mode 100644
index 0000000..1c573bc
--- /dev/null
+++ b/app/src/main/res/layout-land/fragment_b.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".FragmentB">
+
+    <androidx.fragment.app.FragmentContainerView
+        android:layout_width="0dp"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="@id/guidelineCenter"
+        android:layout_height="match_parent"
+        android:id="@+id/containerFragmentBA"/>
+
+    <androidx.fragment.app.FragmentContainerView
+        android:layout_width="0dp"
+        android:layout_height="match_parent"
+        app:layout_constraintStart_toStartOf="@id/guidelineCenter"
+        app:layout_constraintEnd_toEndOf="parent"
+        android:id="@+id/containerFragmentBB"/>
+
+    <androidx.constraintlayout.widget.Guideline
+        android:id="@+id/guidelineCenter"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        app:layout_constraintGuide_percent="0.5"/>
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout-land/fragment_b_a.xml b/app/src/main/res/layout-land/fragment_b_a.xml
new file mode 100644
index 0000000..05801c9
--- /dev/null
+++ b/app/src/main/res/layout-land/fragment_b_a.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/layoutFragmentBA"
+    android:layout_height="match_parent"
+    tools:context=".FragmentBA">
+
+    <TextView
+        android:id="@+id/tittle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        app:layout_constraintTop_toTopOf="parent"
+        android:text="Fragment-BA"
+        android:textColor="@color/black"
+        android:textAlignment="center"
+        android:padding="20dp"
+        android:textSize="18sp"/>
+</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/app/src/main/res/layout/activity_a.xml b/app/src/main/res/layout/activity_a.xml
new file mode 100644
index 0000000..721f0f6
--- /dev/null
+++ b/app/src/main/res/layout/activity_a.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.fragment.app.FragmentContainerView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/containerA"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".ActivityA">
+</androidx.fragment.app.FragmentContainerView>
diff --git a/app/src/main/res/layout/activity_b.xml b/app/src/main/res/layout/activity_b.xml
new file mode 100644
index 0000000..2ba8529
--- /dev/null
+++ b/app/src/main/res/layout/activity_b.xml
@@ -0,0 +1,8 @@
+<androidx.fragment.app.FragmentContainerView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/container_b"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".ActivityB">
+</androidx.fragment.app.FragmentContainerView>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 17eab17..4563d05 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -6,13 +6,29 @@
     android:layout_height="match_parent"
     tools:context=".MainActivity">
 
-    <TextView
+    <Button
+        android:id="@+id/activityA"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="Hello World!"
+        android:text="Activity A"
         app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintEnd_toStartOf="@+id/activityB"
+        app:layout_constraintHorizontal_bias="0.5"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.5" />
+
+    <Button
+        android:id="@+id/activityB"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="64dp"
+        android:text="Activity B"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintStart_toEndOf="@+id/activityA"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.5" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/fragment_a.xml b/app/src/main/res/layout/fragment_a.xml
new file mode 100644
index 0000000..1f7fac6
--- /dev/null
+++ b/app/src/main/res/layout/fragment_a.xml
@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    tools:context=".FragmentA">
+
+    <TextView
+        android:id="@+id/tittle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        app:layout_constraintTop_toTopOf="parent"
+        android:text="FragmentA"
+        android:textColor="@color/black"
+        android:textAlignment="center"
+        android:padding="20dp"
+        android:textSize="18sp"/>
+
+    <Button
+        android:id="@+id/buttonFragmentAA"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginHorizontal="12dp"
+        android:layout_marginTop="20dp"
+        android:padding="6dp"
+        android:text="FragmentAA"
+        android:textSize="16sp"
+        app:layout_constraintTop_toBottomOf="@id/tittle"/>
+
+    <androidx.fragment.app.FragmentContainerView
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/buttonFragmentAA"
+        android:id="@+id/containerFragmentA"/>
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/fragment_a_a.xml b/app/src/main/res/layout/fragment_a_a.xml
new file mode 100644
index 0000000..b261b2c
--- /dev/null
+++ b/app/src/main/res/layout/fragment_a_a.xml
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/layoutFragmentAA"
+    android:layout_height="match_parent"
+    tools:context=".FragmentAA">
+
+    <TextView
+        android:id="@+id/tittle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        app:layout_constraintTop_toTopOf="parent"
+        android:text="FragmentAA"
+        android:textColor="@color/black"
+        android:textAlignment="center"
+        android:padding="20dp"
+        android:textSize="18sp"/>
+
+    <Button
+        android:id="@+id/buttonFragmentAB"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginHorizontal="12dp"
+        android:padding="6dp"
+        android:text="FragmentAB"
+        android:textSize="16sp"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        tools:layout_editor_absoluteX="12dp" />
+</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/app/src/main/res/layout/fragment_a_b.xml b/app/src/main/res/layout/fragment_a_b.xml
new file mode 100644
index 0000000..510dac0
--- /dev/null
+++ b/app/src/main/res/layout/fragment_a_b.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/layoutFragmentAB"
+    android:layout_height="match_parent"
+    tools:context=".FragmentAA">
+
+    <TextView
+        android:id="@+id/tittle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        app:layout_constraintTop_toTopOf="parent"
+        android:text="FragmentAB"
+        android:textColor="@color/black"
+        android:textAlignment="center"
+        android:padding="20dp"
+        android:textSize="18sp"/>
+</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/app/src/main/res/layout/fragment_b.xml b/app/src/main/res/layout/fragment_b.xml
new file mode 100644
index 0000000..bfbce1b
--- /dev/null
+++ b/app/src/main/res/layout/fragment_b.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".FragmentB">
+
+    <androidx.fragment.app.FragmentContainerView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:id="@+id/containerFragmentB"/>
+</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/app/src/main/res/layout/fragment_b_a.xml b/app/src/main/res/layout/fragment_b_a.xml
new file mode 100644
index 0000000..f0706ee
--- /dev/null
+++ b/app/src/main/res/layout/fragment_b_a.xml
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/layoutFragmentBA"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".FragmentBA">
+
+    <TextView
+        android:id="@+id/tittle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:padding="20dp"
+        android:text="FragmentBA"
+        android:textAlignment="center"
+        android:textColor="@color/black"
+        android:textSize="18sp"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <Button
+        android:id="@+id/buttonFragmentBB"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginHorizontal="12dp"
+        android:padding="6dp"
+        android:text="FragmentBB"
+        android:textSize="16sp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/app/src/main/res/layout/fragment_b_b.xml b/app/src/main/res/layout/fragment_b_b.xml
new file mode 100644
index 0000000..d87b2d1
--- /dev/null
+++ b/app/src/main/res/layout/fragment_b_b.xml
@@ -0,0 +1,35 @@
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".FragmentBB">
+
+    <TextView
+        android:id="@+id/tittle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:padding="20dp"
+        android:text="FragmentBB"
+        android:textAlignment="center"
+        android:textColor="@color/black"
+        android:textSize="18sp"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <Button
+        android:id="@+id/buttonSendColor"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginHorizontal="12dp"
+        android:backgroundTint="@android:color/holo_blue_dark"
+        android:padding="6dp"
+        android:text="Set Color"
+        android:textSize="16sp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+
+</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 34277aa..69e7f01 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,3 +1,5 @@
 <resources>
     <string name="app_name">Fragments</string>
+    <!-- TODO: Remove or change this placeholder text -->
+    <string name="hello_blank_fragment">Hello blank fragment</string>
 </resources>
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index bd20018..598d925 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 plugins {
-    id 'com.android.application' version '8.7.2' apply false
-    id 'com.android.library' version '8.7.2' apply false
+    id 'com.android.application' version '8.12.3' apply false
+    id 'com.android.library' version '8.12.3' apply false
     id 'org.jetbrains.kotlin.android' version '2.0.21' apply false
 }
 
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 1f1d072..f464719 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 #Tue Nov 05 08:41:56 CET 2024
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.9-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists