<!DOCTYPE html>
<html lang="en">
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet"
href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
</head>
<body>
<div class="container">
<h1>Bootstrap</h1>
<pre>
Bootstrap is a free and open-source
front-end web framework for designing
websites and web applications.
</pre>
</div>
</body>
</html>