<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"> <ul> <li><a href="#">Link 1</a> <span class="glyphicon glyphicon-info-sign fadein"</li> </ul> </div> </div>

@keyframes fadeIn { from { opacity: 0; } } .fadein{ opacity:1; animation: fadeIn 1s infinite alternate; }