LittleHendrix

@mixin animation (
  $name: false, 
  $duration: false, 
  $timing_function: false, 
  $delay: false, 
  $iteration_count: false, 
  $direction: false
) {
  @if $name            { -webkit-animation-name: $name;                        -moz-animation-name: $name;                          -ms-animation-name: $name; }
  @if $duration        { -webkit-animation-duration: $duration;                -moz-animation-duration: $duration;                  -ms-animation-duration: $duration; }