#box1 {
	top:10px;
	left:0px;
	height:2000px;
	width:2000px;
	position:absolute;
	opacity:0.5;
	
}

#box2 {
	top:500px;
	left:0px;
	height:500px;
	width:100px;
	position:absolute;
	opacity:0.6;
}

#box3 {
	
	left:500px;
	height:1000px;
	width:500px;
	position:absolute;
	opacity:0.3;
	
}
#box4 {
	height:1000px;
	width:500px;
	position:aboslute;
	opacity:0.5;
	
}