<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.2/dist/css/bootstrap.min.css">
<script src="https://cdn.jsdelivr.net/npm/jquery@3.7.1/dist/jquery.slim.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.1/dist/umd/popper.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@4.6.2/dist/js/bootstrap.bundle.min.js"></script>
<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-4638549725433695" crossorigin="anonymous"></script><script src="//www.p2hp.com/tj.js"></script></head>
<body>
<div class="container-fluid">
<h1>Basic Grid Structure</h1>
<p>Resize the browser window to see the effect.</p>
<p>The first, second and third row will automatically stack on top of each other when the screen is less than 576px wide.</p>
<div class="container-fluid">
<div class="row">
<div class="col-sm-6" style="background-color:yellow;">50%</div>
<div class="col-sm-6" style="background-color:orange;">50%</div>
</div>
<br>
<div class="row">