JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="//netdna.bootstrapcdn.com/twitter-bootstrap/2.2.2/css/bootstrap-combined.min.css">
<script src="//netdna.bootstrapcdn.com/twitter-bootstrap/2.2.2/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/underscore.js/1.4.3/underscore-min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/underscore.string/2.3.0/underscore.string.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/backbone.js/0.9.10/backbone-min.js"></script>
<div class="container-fluid">
   <div class="row-fluid">
      <div class="span8">
             Some Element....
       </div>
       <div class="span4">
             Other Element
       </div>   
   </div>       
</div>

CSS

.span8 {
background-color: red;  
}
.span4 {
    background-color: green;
}