body {
	background:url('whats_that_light.jpg') no-repeat center center fixed;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
	}

#container {
	width:100%;
	height:100%;
	}

#choice {
	height:142px;
	width:486px;
	position:absolute;
	left:50%;
	top:50%;
	margin:-71px 0 0 -243px;
	}


.orb1 {
	margin-right:30px;
	float:left;
	height:142px;
	width:142px;
	display:block;
	background:transparent url('orb1.gif') center top no-repeat;
	}

.orb1:hover {
	background-image:url('orb2.gif');
	}

.orb2 {
	float:left;
	height:142px;
	width:142px;
	display:block;
	background:transparent url('orb5.gif') center top no-repeat;
	}

.orb2:hover {
	background-image:url('orb6.gif');
	}
	
.orb3 {
	margin-left:30px;
	float:left;
	height:142px;
	width:142px;
	display:block;
	background:transparent url('orb3.gif') center top no-repeat;
	}

.orb3:hover {
	background-image:url('orb4.gif');
	}