<!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@3.6.1/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>
</head>
<body>
<div class="container p-3 my-3 border">
<h1>My First Bootstrap Page</h1>
<p>This container has a border and some extra padding and margins.</p>
</div>
<div class="container p-3 my-3 bg-dark text-white">
<h1>My First Bootstrap Page</h1>
<p>This container has a dark background color and a white text, and some extra padding and margins.</p>
</div>
<div class="container p-3 my-3 bg-primary text-white">
<h1>My First Bootstrap Page</h1>
<p>This container has a blue background color and a white text, and some extra padding and margins.</p>
</div>