#cont1{
	width:200px;
	height:200px;
	border:1px solid black;
	background-color:yellow;
	color:black;
	margin:4px;
	float:left;
}

#cont2{
	width:200px;
	height:200px;
	border:1px solid black;
	background-color:orange;
	color:black;
	margin:4px;
	float:left;
}

#cont3{
	width:200px;
	height:200px;
	border:1px solid black;
	background-color:red;
	color:black;
	margin:4px;
	clear:left;
	float:left;
}

#cont4{
	width:200px;
	height:200px;
	border:1px solid black;
	background-color:blue;
	color:black;
	margin:4px;
	float:left;
}