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CSS

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CSS Base

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HTML 

              
                <div class="container">
  <div class="cube">
    <div class="half1">
      <div class="side s1"></div>
      <div class="side s2"></div>
      <div class="side s5"></div>
    </div>
    <div class="half2">
      <div class="side s3"></div>
      <div class="side s4"></div>
      <div class="side s6"></div>
    </div>
  </div>
</div>
!

CSS 

              
                @import "bourbon";

body {
  background: black;
  color: white;
}
.cube,.half1,.half2,.container {
  @include transform-style( preserve-3d );
}
.container {
  position: relative;
  width: 100px;
  height: 100px;
  margin:150px auto 0;
  @include perspective( 300px );
}
.cube {
  width: 100px;
  height: 100px;
}
.cube {
  @include animation( cube 10.0s forwards infinite );
  @include transform-origin( center 50px  );
}
.half1 {
  height: 40px;
  top: 0;
  position: absolute;
  @include animation( half-fold 10.0s forwards infinite );
  @include transform-origin( 50% 100% );
}
.side {
  width: 20px;
  height: 20px;
  background: white;
  position: absolute;
}
.s1 {
  top:0;
  left: 40px;
  @include transform-origin( 50% 100% );
  @include animation( s1ani 10.0s forwards infinite );
}
.s2 {
  top: 20px;
  left: 40px;
  @include transform-origin( 50% 0% );
  @include animation( s2ani 10.0s forwards infinite );
}
.s3 {
  top: 40px;
  left: 40px;
  @include transform-origin( 50% 0% );
  @include animation( s3ani 10.0s forwards infinite );
}
.s4 {
  top: 60px;
  left: 40px;
  @include transform-origin( 50% 0% );
  @include animation( s4ani 10.0s forwards infinite );
}
.s5 {
  left:20px;
  top: 20px;
  @include transform-origin( 100% 50% );
  @include animation( s5ani 10.0s forwards infinite );
}
.s6 {
  left:60px;
  top: 40px;
  @include transform-origin( 0% 50% );
  @include animation( s6ani 10.0s forwards infinite );
}

@include keyframes( s1ani ) {
  0% {
    opacity: 1;
    @include transform( translateY(0px) );
  }
  10% {
    opacity: 1;
  }
  20% {
    opacity: 1;
  }
  30% {
    opacity: 1;
  }
  40% {
    @include transform( rotateX(0deg) );
  }
  50% {
    @include transform( rotateX(-90deg) );
  }
  60% {
  }
  70% {
  }
  80% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    opacity: 1;
  }
}
@include keyframes( s2ani ) {
  0% {
    opacity: 0;
    @include transform( rotateX(-179deg) );
  }
  10% {
    opacity: 1;
    @include transform( rotateX(0deg) );
  }
  20% {
    opacity: 1;
  }
  30% {
    opacity: 1;
  }
  40% {
    opacity: 1;
  }
  50% {
    opacity: 1;
  }
  60% {
    opacity: 1;
  }
  70% {
    opacity: 1;
  }
  80% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    opacity: 1;
  }
}
@include keyframes( s3ani ) {
  0% {
    opacity: 0;
    @include transform( rotateX(-179deg) );
  }
  10% {
    opacity: 0;
    @include transform( rotateX(-179deg) );
  }
  20% {
    opacity: 1;
    @include transform( rotateX(0deg) );
  }
  30% {
    opacity: 1;
  }
  40% {
    opacity: 1;
  }
  50% {
    opacity: 1;
  }
  60% {
    opacity: 1;
  }
  70% {
    opacity: 1;
  }
  80% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    opacity: 1;
  }
}

@include keyframes( s4ani ) {
  0% {
    opacity: 0;
    @include transform( rotateX(-179deg) );
  }
  10% {
    opacity: 0;
  }
  20% {
    opacity: 0;
    @include transform( rotateX(-179deg) );
  }
  30% {
    opacity: 1;
    @include transform( rotateX(0deg) );
  }
  40% {
    @include transform( rotateX(0deg) );
  }
  50% {
    @include transform( rotateX(90deg) );
    opacity: .5;
  }
  60% {
    opacity: .5;
  }
  70% {
    opacity: .5;
  }
  80% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    opacity: 1;
  }
}
@include keyframes( s5ani ) {
  0% {
    opacity: 0;
    @include transform( rotateY(-179deg) );
  }
  10% {
    opacity: 0;
    @include transform( rotateY(-179deg) );
  }
  20% {
    opacity: 1;
    @include transform( rotateY(0deg) );
  }
  30% {
    opacity: 1;
  }
  40% {
    @include transform( rotateY(0deg) );
  }
  50% {
    @include transform( rotateY(90deg) );
  }
  60% {
    opacity: 1;
  }
  70% {
    opacity: 1;
  }
  80% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    opacity: 1;
  }
}
@include keyframes( s6ani ) {
  0% {
    opacity: 0;
    @include transform( rotateY(179deg) );
  }
  10% {
    opacity: 0;
  }
  20% {
    opacity: 0;
    @include transform( rotateY(179deg) );
  }
  30% {
    opacity: 1;
    @include transform( rotateY(0deg) );
  }
  40% {
    @include transform( rotateY(0deg) );
  }
  50% {
    @include transform( rotateY(-90deg) );
  }
  60% {
    opacity: 1;
  }
  70% {
    opacity: 1;
  }
  80% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    opacity: 1;
  }
}
body {
  background: black;
  color: white;
}
.container {
  position: relative;
  width: 100px;
  height: 100px;
  margin:100px auto 0;
  @include perspective( 300px );
  @include transform-style( preserve-3d );
}
.cube {
  @include transform-style( preserve-3d );
}
.side {
  width: 20px;
  height: 20px;
  background: white;
  position: absolute;
}
.s1 {
  top:0;
  left: 40px;
  @include transform-origin( 50% 100% );
  @include animation( s1ani 10.0s forwards infinite );
}
.s2 {
  top: 20px;
  left: 40px;
  @include transform-origin( 50% 0% );
  @include animation( s2ani 10.0s forwards infinite );
}
.s3 {
  top: 40px;
  left: 40px;
  @include transform-origin( 50% 0% );
  @include animation( s3ani 10.0s forwards infinite );
}
.s4 {
  top: 60px;
  left: 40px;
  @include transform-origin( 50% 0% );
  @include animation( s4ani 10.0s forwards infinite );
}
.s5 {
  left:20px;
  top: 20px;
  @include transform-origin( 100% 50% );
  @include animation( s5ani 10.0s forwards infinite );
}
.s6 {
  left:60px;
  top: 40px;
  @include transform-origin( 0% 50% );
  @include animation( s6ani 10.0s forwards infinite );
}

@include keyframes( cube ) {
  0% {
    @include transform( rotateX(0deg) );
  }
  30% {
    @include transform( rotateX(0deg) );
  }
  40% {
    @include transform( rotateX(45deg) rotateY(0deg) rotateZ(45deg) ); /* CUBE ROTATES BACK */
  }
  60% {
    @include transform( rotateX(60deg) rotateY(0deg)  rotateZ(45deg)  ); /* ARMS FOLD UP */
  }
  65% {
    @include transform( rotateX(60deg) rotate(45deg) rotateZ(180deg)  ); /* SPIN REVEALS CYAN RIGHT, RED LEFT (s2) */
  }
  70% {
    @include transform( rotateX(60deg) rotate(45deg) rotateZ(180deg) );
  }
  75% {
    @include transform( rotateX(60deg) rotate(45deg) rotateZ(360deg) ); /* SPIN REVEALS MAGENTA RIGHT, YELLOW LEFT (s4) */
  }
  80% {
    @include transform( rotateX(60deg) rotate(45deg) rotateZ(360deg) );
  }
  90% {
    @include transform( rotateX(0deg) rotate(0deg) rotateZ(0deg) ); /* FADE TO BLACK */
  }
}
@include keyframes( s1ani ) {
  0% {
    opacity: 1;
    @include transform( translateY(0px) );
    background: rgba(255,255,255,1);
  }
  40% {
    @include transform( rotateX(0deg) );
    background: rgba(255,255,255,1);
  }
  50% {
    @include transform( rotateX(-90deg) );
    background: rgba(255,255,255,1);
  }
  90% {
    @include transform( rotateX(-90deg) );
  }
}
@include keyframes( s2ani ) {
  0% {
    opacity: 0;
    @include transform( rotateX(-179deg) );
  }
  10% {
    opacity: 1;
    @include transform( rotateX(0deg) );
  }
  40% {
    background: white;
  }
  45% {
    background: rgb(180,180,180);
  }
  65% {
    opacity: 1;
    background: rgb(180,180,180); /* DARKEST VISIBLE */
  }
  80% {
    background: rgb(180,180,180);
  }
  90% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}
@include keyframes( s3ani ) { 
  // bottom square
  0% {
    opacity: 0;
    @include transform( rotateX(-179deg) );
  }
  10% {
    opacity: 0;
    @include transform( rotateX(-179deg) );
  }
  20% {
    opacity: 1;
    @include transform( rotateX(0deg) );
  }
  40% {
    background: white;
  }
  45% {
    background: rgb(150,150,150); /* DARKEST VISIBLE */
  }
  90% {
    opacity: 1;
    @include transform( rotateX(0deg) );
  }
  100% {
    opacity: 0;
  }
}

@include keyframes( s4ani ) {
  0% {
    opacity: 0;
    @include transform( rotateX(-179deg) );
  }
  10% {
    opacity: 0;
  }
  20% {
    opacity: 0;
    @include transform( rotateX(-179deg) );
  }
  30% {
    opacity: 1;
    @include transform( rotateX(0deg) );
  }
  40% {
    @include transform( rotateX(0deg) );
    background: white;
  }
  50% {
    @include transform( rotateX(90deg) );
    background: rgb(180,180,180);
  }
  80% {
    background: rgb(180,180,180);
  }
  90% {
    opacity: 1;
    @include transform( rotateX(90deg) );
  }
  100% {
    opacity: 0;
  }
}
@include keyframes( s5ani ) {
  0% {
    opacity: 0;
    @include transform( rotateY(-179deg) );
  }
  10% {
    opacity: 0;
    @include transform( rotateY(-179deg) );
  }
  20% {
    opacity: 1;
    background: white;
    @include transform( rotateY(0deg) );
  }
  40% {
    @include transform( rotateY(0deg) );
  }
  50% {
    @include transform( rotateY(90deg) );
  }
  55% {
    background: white;
  }
  60% {
    background: rgb(200,200,200);
  }
  90% {
    @include transform( rotateY(90deg) );
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}
@include keyframes( s6ani ) {
  0% {
    opacity: 0;
    @include transform( rotateY(179deg) );
  }
  20% {
    opacity: 0;
    @include transform( rotateY(179deg) );
  }
  30% {
    opacity: 1;
    @include transform( rotateY(0deg) );
  }
  40% {
    @include transform( rotateY(0deg) );
  }
  50% {
    @include transform( rotateY(-90deg) );
    background: white
  }
  60% {
    background: rgb(200,200,200);
  }
  80% {
    background: rgb(200,200,200);
  }
  90% {
    opacity:1;
    @include transform( rotateY(-90deg) );
  }
  100% {
    opacity: 0;
  }
}
@include keyframes( half-fold ) {
  0% {
    @include transform( rotateX(0deg) );
  }
  50% {
    @include transform( rotateX(0deg) );
  }
  60% {
    @include transform( rotateX(-90deg) );
  }
  90% {
    @include transform( rotateX(-90deg) );
  }
}
!

JS 

              
                /*
Entry for /r/web_design pre-loader competition.

Thanks!
*/
!
999px

Console