Plan your IG grid on local html
Write a path for image like below:
~~~
<body style="background-color: black;">
<div class="ig-grid">
<img src="/your/dir/pic4.jpg">
<img src="/your/dir/pic3.jpg">
<img src="/your/dir/pic2.jpg">
<img src="/your/dir/pic1.jpg">
</div>
</body>
</html>