=sprite($width, $height, $position)
  background-image: url(/images/structure/smile_sprite.svg)
  background-size: 280px 120px
  background-position: $position
  width: $width
  height: $height


=spriteMobile($backgroundX, $backgroundY, $width ,$height, $scale : 1)
  width: $width * $scale
  height: $height * $scale

  background-position: ($backgroundX * $scale) ($backgroundY * $scale)

  background-size: (220px * $scale) (120px * $scale)
  background-image: url(/images/structure/sprite_mobile.svg)