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HTML 

              
                <div class="stage example example4">
  <div class="scaler">
    <div class="triangle one">
      <figure class="front"> </figure>
      <figure class="back"> </figure>
      <figure class="side1"> </figure>
      <figure class="side2"> </figure>
      <figure class="side3"> </figure>
    </div>
    <div class="triangle two">
      <figure class="front"> </figure>
      <figure class="back"> </figure>
      <figure class="side1"> </figure>
      <figure class="side2"> </figure>
      <figure class="side3"> </figure>
    </div>
    <div class="triangle three">
      <figure class="front"> </figure>
      <figure class="back"> </figure>
      <figure class="side1"> </figure>
      <figure class="side2"> </figure>
      <figure class="side3"> </figure>
    </div>
  </div>
</div>
!

CSS 

              
                @import compass

=animation($values...)
  -webkit-animation: $values
  -moz-animation: $values
  -o-animation: $values
  -ms-animation: $values
  animation: $values

//============================================================
//
// arrow
//
// @param width           :  px, em
// @param height          :  px, em
// @param direction       :  up, down, left, right
// @param color           :  hex, rgb
//
//============================================================

=arrow($width: 20px, $height: 20px, $direction: up, $color: red)
  
  width: 0 
  height: 0
  
  // Right
  @if $direction == right
    border-top: $height/2 solid transparent
    border-bottom: $height/2 solid transparent
    border-left: $width solid $color

  // Left
  @if $direction == left
    border-top: $height/2 solid transparent
    border-bottom: $height/2 solid transparent
    border-right: $width solid $color

  // Up
  @if $direction == up
    border-left: $width/2 solid transparent
    border-right: $width/2 solid transparent
    border-bottom: $height solid $color

  // Down
  @if $direction == down
    border-left: $width/2 solid transparent
    border-right: $width/2 solid transparent
    border-top: $height solid $color


$animationDuration: 5s
$triangleColour: #ffd200
$triangleLightColour: #ffe403
$triangleDarkColour: #ffd200

body
  background-color: #666

.stage
  position: relative
  width: 300px
  height: 200px
  @include border-radius(5px)
  @include perspective(800px)
  @include perspective-origin(120% -200px) 

  .triangle
    position: absolute
    top: 0
    left: 75px
    width: 150px
    height: 150px
    @include transform-style(preserve-3d)
    @include transform-origin(125px)

    figure
      display: block
      position: absolute
      @include backface-visibility(hidden)

  &.example4

    .triangle
      top: 20px
      @include animation(rotate 5s linear infinite)

    figure
      &.front
        +arrow(150px, 150px, up, $triangleLightColour)
        @include transform(translateZ(20px))

      &.back
        +arrow(150px, 150px, up, $triangleLightColour)
        @include transform(translateZ(-20px) rotateY(180deg))

      &.side1
        content: " "
        display: block
        position: absolute
        height: 168px
        width: 40px
        background-color: $triangleDarkColour
        @include transform(translateY(-9px) translateX(18px) rotateY(-90deg) rotateX(26.5deg))

      &.side2
        content: " "
        display: block
        position: absolute
        height: 168px
        width: 40px
        background-color: $triangleDarkColour
        @include transform(translateY(-9px) translateX(92px) rotateY(90deg) rotateX(26.5deg))

      &.side3
        content: " "
        background-color: $triangleDarkColour
        width: 150px
        height: 40px
        @include transform(translateY(130px) rotateX(-90deg))

  &.example4
    @include perspective-origin(120% -200px)

    .scaler
      @include transform(scale(0.8))
      position: absolute
      top: -20px
      left: 40px
    .triangle
      top: 0
      @include animation(rotate $animationDuration infinite linear)

      &.two
        top: 150px
        left: 0

      &.three
        top: 150px
        left: 150px
        
=keyframes($name)
  @-webkit-keyframes #{$name}
    @content
  @-moz-keyframes #{$name}
    @content
  @-ms-keyframes #{$name}
    @content
  @keyframes #{$name}
    @content
  
@include keyframes(rotate)
  0%
    @include transform(rotateY(0))
  100%
    @include transform(rotateY(360deg))
!

JS
!
999px

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