div{
	width: 800px;
	height:400px;
	border: 5px solid #333;
	margin: 10px auto;
	background-color: rgba(255,255,0,0.2);
	
}
#ex1, #ex2, #ex3{
	background-image: url("../images/smile.jpg");
	
}
#ex1{
	background-repeat: no-repeat;
}
#ex2{
	background-repeat: round no-repeat;
}
#ex3{
	background-repeat: space no-repeat;
}