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HTML

            
              <article>
    <div class="entry-thumb static">
        <div class="part part-1"></div>
        <div class="part part-2"></div>
        <div class="part part-3"></div>
        <div class="part part-4"></div>
  </div>
</article>


<article>
    <div class="entry-thumb four">
        <div class="part part-1"></div>
        <div class="part part-2"></div>
        <div class="part part-3"></div>
        <div class="part part-4"></div>
  </div>
</article>

<article>
    <div class="entry-thumb three">
        <div class="part part-1"></div>
        <div class="part part-2"></div>
        <div class="part part-3"></div>
        <div class="part part-4"></div>
  </div>
</article>

<article>
    <div class="entry-thumb two">
        <div class="part part-1"></div>
        <div class="part part-2"></div>
        <div class="part part-3"></div>
        <div class="part part-4"></div>
  </div>
</article>

<article>
    <div class="entry-thumb one">
        <div class="part part-1"></div>
        <div class="part part-2"></div>
        <div class="part part-3"></div>
        <div class="part part-4"></div>
  </div>
</article>
!

CSS

            
              @import "compass/css3";

html,body{min-height:100%;}

article{
  width:1024px;
  height:768px;
  background:transparent;
  left:50%;
  position:absolute;
  top:50%;
  transform:translate(-50%,-50%);
  vertical-align:middle;
}
.entry-thumb{
  height:100%;
  position:relative;
  perspective:1200px;
  .part{
    background-size:cover;
    width:100%;
    height:192px;
    position:relative;
    z-index:100;
    &:nth-child(odd) {
      transform-origin: top;
    }
    &:nth-child(even) {
      transform-origin: bottom;
    }
  }
  
  &.one{
    .part:nth-child(odd){animation:fold-odd1 6s infinite normal linear;}
    .part:nth-child(even){animation:fold-even1 6s infinite normal linear;}
  }
  &.two{
    .part:nth-child(odd){animation:fold-odd2 6s infinite normal linear;}
    .part:nth-child(even){animation:fold-even2 6s infinite normal linear;}
  }
  &.three{
    .part:nth-child(odd){animation:fold-odd3 6s infinite normal linear;}
    .part:nth-child(even){animation:fold-even3 6s infinite normal linear;}
  }
  &.four{
    .part:nth-child(odd){animation:fold-odd4 6s infinite normal linear;}
    .part:nth-child(even){animation:fold-even4 6s infinite normal linear;}
  }

  
  &.static,  
  &.one{.part{background:url('http://awampk.com/wp-content/uploads/2013/02/Beautiful-Nature-Landscapes-Wallpapers1.jpeg') no-repeat;}}  
  &.two{.part{background:url('http://www.deshow.net/d/file/travel/2009-10/earths-treasures-725-2.jpg') no-repeat;}}  
  &.three{.part{background:url('http://webtaj.com/images/beautiful-animated-landscapes-computer-deskstop_190235.jpg') no-repeat;}}  
  &.four{.part{background:url('https://lh3.ggpht.com/-aIOkymCTSPk/UP2RACbmHDI/AAAAAAAAtQI/qt00V9uf8s8/s1600/free-beautiful-landscape-desktop-wallpaper-06-2010_1024x768_81785.jpg') no-repeat;}}  
} 
  
.part-2 {
  background-position:0 -192px!important;
}
.part-3 {
  background-position:0 -384px!important;
}
.part-4 {
  background-position:0 -576px!important;
}

@keyframes fold-odd1{
  0%{opacity:1;transform:rotateX(0deg);}
  23%{opacity:1;}
  25%{opacity:0;transform:rotateX(90deg);}
  100%{opacity:0;transform:rotateX(90deg);}
}

@keyframes fold-even1{
  0%{opacity:1;transform:rotateX(0);margin-top:0px;}
  5%{margin-top:-19px}
  10%{margin-top:-75px}
  15%{margin-top:-176px}
  20%{margin-top:-265px}
  23%{opacity:1;}
  25%{opacity:0;transform:rotateX(-90deg);margin-top:-384px;}
  100%{opacity:0;transform:rotateX(-90deg);margin-top:-384px;}
}

@keyframes fold-odd2{
  0%{opacity:0;transform:rotateX(0deg);}
  2%{opacity:1;}
  25%{opacity:1;transform:rotateX(0deg);}
  48%{opacity:1;}
  50%{opacity:0;transform:rotateX(90deg);}
  100%{opacity:0;transform:rotateX(90deg);}
}

@keyframes fold-even2{
  0%{opacity:0;transform:rotateX(0);margin-top:0px;}
  2%{opacity:1;}
  25%{opacity:1;transform:rotateX(0);margin-top:0px;}
  30%{margin-top:-19px}
  35%{margin-top:-75px}
  40%{margin-top:-176px}
  45%{margin-top:-265px}
  48%{opacity:1;}
  50%{opacity:0;transform:rotateX(-90deg);margin-top:-384px;}
  100%{opacity:0;transform:rotateX(-90deg);margin-top:-384px;}
}

@keyframes fold-odd3{
  0%{opacity:0;transform:rotateX(0deg);}
  4%{opacity:1;}
  50%{opacity:1;transform:rotateX(0deg);}
  73%{opacity:1;}
  75%{opacity:0;transform:rotateX(90deg);}
  100%{opacity:0;transform:rotateX(90deg);}
}

@keyframes fold-even3{
  0%{opacity:0;transform:rotateX(0);margin-top:0px;}
  4%{opacity:1;}
  50%{opacity:1;transform:rotateX(0);margin-top:0px;}
  55%{margin-top:-19px}
  60%{margin-top:-75px}
  65%{margin-top:-176px}
  70%{margin-top:-265px}
  73%{opacity:1;}
  75%{opacity:0;transform:rotateX(-90deg);margin-top:-384px;}
  100%{opacity:0;transform:rotateX(-90deg);margin-top:-384px;}
}

@keyframes fold-odd4{
  0%{opacity:0;transform:rotateX(0deg);}
  4%{opacity:1;}
  75%{transform:rotateX(0deg);}
  98%{opacity:1;}
  100%{opacity:0;transform:rotateX(90deg);}
}

@keyframes fold-even4{
  0%{opacity:0;transform:rotateX(0);margin-top:0px;}
  4%{opacity:1;}
  75%{opacity:1;transform:rotateX(0);margin-top:0px;}
  80%{margin-top:-19px}
  85%{margin-top:-75px}
  90%{margin-top:-176px}
  95%{margin-top:-265px}
  98%{opacity:1;}
  100%{opacity:0;transform:rotateX(-90deg);margin-top:-384px;}
}
!

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