<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 ---------->
<div class="container">
<div class="row">
<p>Demonstrate fadeToggle() with different speed parameters.</p>
<button class="btn btn-default">Click to fade in/out boxes</button><br><br>
<div id="div1" class="card SkyBlue"></div>
<div id="div2" class="card Crimson"></div>
</div>
</div>