.s1 {
	width: 802px;
	background-color: #E1E2E3;
} 

.s2 {
	background-color: #E5E6E7;
	width: 804px;
}
 
.s3 {
	background-color: #E9EAEA;
	width: 806px;;
}

.s4 {
	background-color: #EDEEEE;
	width: 808px;
}
 
 
.s1, .s2, .s3 { 
	top: -1px;
	right: -1px;
	position: relative;
}