.box1{
	background-color:#FFDFFF;
	height:10%;
}

.box2{
	float:left;
	width:50%;
	background-color:#FFFFB3;
	height:60%;
}

.box3{
	float:left;
	width:50%;
	background-color:#B5FFB5;
	height:60%;
}

.box4{
	background-color:#DDEEFF;
	height:20%;
}

.boxA:after{
	content:"";
	display:block;
	clear:both;
}