JSFiddle - React, Tailwind, and code Playground

HTML

<link href="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.1.0/css/bootstrap-combined.min.css" rel='stylesheet' type='text/css' />
<div id='wrap' class='container'>
        <div id='row1' class='row-fluid'>
            <div id='box1' class='span6'>
               box1
            </div>
             <div id='box2' class='span6'>
                 box2
                </div>
        </div>
</div>

CSS

#wrap{
    background-color:black;
}
#box1{
        background-color:green;
    min-height: 20px;
}

#box2{
        background-color:red;
    min-height: 20px;
}