Media block

gistfile1.scss

// Media block
@mixin mb($position: left, $spacing:0, $media: '.media', $block: '.block') {
  overflow: hidden;
 	#{unquote($media)} {
		float:$position;
		@if $spacing > 0 {
			margin-#{opposite-position($position)}:$spacing;
		}
	}
	#{unquote($block)} {
		overflow:hidden;
	}
}