JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
<div class="row">
    <div class="col-xs-4">content
        <br>content
        <br>content
        <br>content
        <br>content</div>
    <div class="col-xs-8">content
        <br>content
        <br>content</div>
</div>
<div class="row">
    <div class="col-xs-6">content
        <br>content
        <br>content
        <br>content
        <br>content
        <br>
    </div>
    <div class="col-xs-6">content
        <br>content
        <br>content
        <br>content
        <br>content
        <br>
    </div>
</div>

CSS

.col-xs-4 {
    background:red;
}
.col-xs-6 {
    background:green;
}