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<html lang="en"><head> <title>Bootstrap Example</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet"> <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script></head><body> <div class="container p-5 my-5 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-5 my-5 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-5 my-5 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></body></html>