<!DOCTYPE html>
<html>
<head>
<title>Bootstrap Grid Demo</title>
<!-- Add Bootstrap CSS from a CDN -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
</head>
<body>
<div class="container">
<h1>Bootstrap Grid Demo</h1>
<p>This page demonstrates Bootstrap's grid system for responsive layouts.</p>
<!-- Bootstrap Grid -->
<div class="row">
<div class="col-md-6">
<div class="alert alert-primary">
<h3>Column 1</h3>
<p>This is the left column.</p>
</div>
</div>
<div class="col-md-6">
<div class="alert alert-secondary">
<h3>Column 2</h3>
<p>This is the right column.</p>
</div>
</div>
</div>
</div>
<!-- Add Bootstrap JavaScript and jQuery from a CDN -->
<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.5.3/dist/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
</body>
</html>