Useful Mixins

Create Full Background Image

@mixin backImage($url, $repeat: no-repeat,
 $origin:border-box,
  $position:center center,
   $size:cover){
	// url, no-repeat, border-box|content-box, center center
	
	background-image:url($url);
	background-repeat: $repeat;
	background-origin: $origin;
	background-position: $position;
	-webkit-background-size: $size; 
	-o-background-size: $size; 
	background-size: $size; 
}