gistfile1.sass

div
  &#rocket_space
    width: 750px
    height: 500px
    background: url("/images/background.png") no-repeat

  &.rocket_background
    position: absolute
    left: 200px
    top: 120px
    +transition(all 2s cubic-bezier(0.6, 0.01, 0, 0.24))
    img
      +transition(all 1s ease-in-out)

  &.active_rocket
    +translate(450px, 250px)
    img
      +rotateScale(40, 0.2)