CSS3 ribbon mixin

gistfile1.scss

// ribbon
@mixin ribbon($width, $x, $y, $color){
	position:relative;
	z-index:1;
	&:after{
		content:'';
		@include position-absolute(bottom, $y, right, $x, -1);
		border:{
			width:$width;
			style:solid;
			color:transparent;
			left-color:$color;
		}
	}
}