<body>
	<div id="div2_1" >
		<div id="div2_2" class="orange">
			<div id="div2_3" class="yellow">
				<div id="div2_4" class="green">cc</div>
			</div>
		</div>
	</div>
</body>
		.red {background: #ff0000;}
		.orange {background: #FF6600;}
		.yellow {background: #FFFF00;}
		.green  {background: #00CC00;}

		#div2_1 {
			width:300px;
			border: double #24d76f;
		}
		#div2_2 {
			margin: 20px;
		}
		#div2_3 {
			margin: 20px;
		}
		#div2_4 {
			height:150px;
			margin: 20px;
		}
Rerun