gistfile1.txt

@mixin stretch($offset-top:0, $offset-right:0, $offset-bottom:0, $offset-left:0) {
  position: absolute;
  @if $offset-top { top: $offset-top; }
  @if $offset-bottom { bottom: $offset-bottom; }
  @if $offset-left { left: $offset-left; }
  @if $offset-right { right: $offset-right; }
}