Untitled

dabblet.css

.first{
	border:1px solid #ccc;
	width:100%;
	padding:20px;
	background:green;
	-webkit-box-sizing:border-box;
}
.parent{
 background:#ccc;
 padding:10px;
 float:left;
 width:100%;
 -webkit-box-sizing:border-box;
}
.left, .right{
 width:50%;
 padding:20px;
 background:red; 
 float:left; 
 min-height:100px;
 -webkit-box-sizing:border-box;
 }
 .right{
 background:green;
 }

dabblet.html

<div class="first">vhvhj</div>
 

<div class="parent">
  <div class="left">left</div>
  <div class="right">left</div>
</div>

dabblet.js

// alert('Hello world!');

settings.json

{"view":"separate","fontsize":"100","seethrough":"","prefixfree":"1","page":"all"}