Sass sprite mixin

sprite.scss

@mixin sprite($width, $height, $x, $y, $asset : "../img/assets.png") {
	width:$width;
	height:$height;
	background-image:url($asset);
	background-position:$x $y;
	background-repeat:no-repeat;
	color:transparent !important;
	text-indent:-999em;
	padding:0;
	display:inline-block;
	overflow:hidden;
}