diff --git a/computation.py b/computation.py
new file mode 100644
index 0000000..d7f5ddc
--- /dev/null
+++ b/computation.py
@@ -0,0 +1,33 @@
+import serial 
+
+ser = serial.Serial('COM3', 9600)
+
+def compute():
+
+    response = ser.read()
+
+    if response[0] == 'x':
+        distance_1 = ''
+
+        for char in range(1, len(response)):
+            distance_1 += str(response[char]) 
+            
+        f_distance_1 = int(distance_1) 
+
+    else:
+        distance_2 = '' 
+
+        for char in range(1, len(response)): 
+            distance_1 += str(response[char])  
+
+        f_distance_2 = int(distance_2)
+
+    if f_distance_1 > f_distance_2: 
+        ser.write('a'.encode())
+        
+    else:
+        ser.write('b'.encode())
+
+      
+
+