Animation mixin with Compass

gistfile1.sass

/* animation mixins  */
@mixin animation($name, $duration: 500ms, $fill_mode: forwards, $iteration_count: 1, $delay: 0,  $direction: normal, $timing_function: ease)
  +experimental(animation-name, $name)
  +experimental(animation-duration, $duration)
  +experimental(animation-fill-mode, $fill_mode)
  +experimental(animation-iteration-count, $iteration_count)
  +experimental(animation-delay, $delay)
  +experimental(animation-direction, $direction)
  +experimental(animation-timing-function, $timing_function)
    
@mixin keyframe ($animation_name)
  @-webkit-keyframes #{$animation_name}
    @content
  @-moz-keyframes #{$animation_name}
    @content
  @keyframes #{$animation_name}
    @content

/* example animation */
@include keyframe(pointypoint)
  0%
    +transform(translateY(0))
  50%
    +transform(translateY(10px))
  100%
    +transform(translateY(0))

.bob:hover
  @include animation(pointypoint, 500ms, forwards, infinite)