<link href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <h2>Create your snippet's HTML, CSS and Javascript in the editor tabs</h2> </div> </div> <div class="button"> <a class="btn btn-default" href="#" role="button">Button</a> </div>

.button { padding: 20px; } .btn { text-decoration: none; color: black; border: 1px solid; margin: 20px; border-radius: 50px; margin-top: 10px; -o-transition: .5s; -ms-transition: .5s; transition: .5s; } .btn:hover{ background-color: aqua; color: red; font-size: 20px; text-shadow: 2px 2px 2px; }