#cloud1 {
		margin: 0 auto;
		padding: 0;
		position: fixed;
		z-index: 8;
		top: 0px;
		left: 30%;
		width: 300px;
		height: 120px;
		background: url('../images/sprite.png') -520px -20px no-repeat;
	}
	#cloud2 {
		margin: 0;
		padding: 0;
		position: fixed;
		z-index: 10;
		top: 300px;
		left: 10%;
		width: 390px;
		height: 160px;
		background: url('../images/sprite.png') -880px -265px no-repeat;
	}	
	#cloud3 {
		display: none;
		margin: 0 auto;
		padding: 0;
		position: fixed;
		z-index: 9;
		top: 10px;
		left: 70%;
		width: 300px;
		height: 175px;
		background: url('../images/sprite.png') -520px -250px no-repeat;
	}
	#cloud4 {
		margin: 0 auto;
		padding: 0;
		position: fixed;
		z-index: 8;
		top: 300px;
		left: 70%;
		width: 500px;
		height: 250px;
		background: url('../images/sprite.png') -810px -0px no-repeat;
	}
	
	#cloud-set-1 {
		position: fixed;
		z-index: 1;
		width: 800px;
		height: 450px;
		top: 10px;
		left: -10%;
		background: url('../images/core/cloud-set-3.png') 0 0 no-repeat;
	}
	
	#cloud-set-2 {
		position: fixed;
		z-index: 1;
		width: 800px;
		height: 450px;
		top: 50px;
		left: 40%;
		margin-left: -225px;
		background: url('../images/core/cloud-set-2.png') 0 0 no-repeat;
	}
	
	#cloud-set-3 {
		position: fixed;
		z-index: 1;
		width: 800px;
		height: 450px;
		top: 10px;
		left: 100%;
		margin-left: -600px;
		background: url('../images/core/cloud-set-1.png') 0 0 no-repeat;
	}