<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>
<div class="container">
<div class="col-md-12">
<h1>Bootstrap Thumbnail Slider</h1>
<div class="well">
<div id="myCarousel" class="carousel slide">
<div class="carousel-inner">
<div class="item active">
<div class="row">
<div class="col-sm-3"><a href="#x"><img src="http://placehold.it/500x500" alt="Image" class="img-responsive"></a>
</div>
<div class="col-sm-3"><a href="#x"><img src="http://placehold.it/500x500" alt="Image" class="img-responsive"></a>
</div>
<div class="col-sm-3"><a href="#x"><img src="http://placehold.it/500x500" alt="Image" class="img-responsive"></a>
</div>
<div class="col-sm-3"><a href="#x"><img src="http://placehold.it/500x500" alt="Image" class="img-responsive"></a>
</div>
</div>
</div>
<div class="item">
<div class="row">
<div class="col-sm-3"><a href="#x" class="thumbnail"><img src="http://placehold.it/250x250" alt="Image" class="img-responsive"></a>
</div>
<div class="col-sm-3"><a href="#x" class="thumbnail"><img src="http://placehold.it/250x250" alt="Image" class="img-responsive"></a>
</div>
<div class="col-sm-3"><a href="#x" class="thumbnail"><img src="http://placehold.it/250x250" alt="Image" class="img-responsive"></a>
</div>
<div class="col-sm-3"><a href="#x" class="thumbnail"><img src="http://placehold.it/250x250" alt="Image" class="img-responsive"></a>