<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <link rel="stylesheet" href="http://www.w3schools.com/lib/w3.css"> <div class="container"> <div class="row w3-padding-4"> <h2 class="w3-orange w3-padding-10">Create your snippet's HTML, CSS and Javascript in the editor tabs</h2> </div> </div>