A CodePen by ds729. Sliding door effects using CSS - I've used border tricks to get the effect.

index.html

<div class="slidingdoors">
  <div class="slidetop"></div>
  <div class="slideright"></div>
  <div class="slidebottom"></div>
  <div class="slideleft"></div>
  <h3>follow me 
    <a href="https://twitter.com/samarkandiy" target="_blank">@samarkandiy</a>
  </h3>
</div>

style.css

body{
  background: #333 url(/images/classy_fabric.png);
  width: 960px;
  margin: 0 auto;
  padding: 15px;
}

.slidingdoors div{
  color: #fff;
  font-family: 'Verdana';
  font-weight: bold;
  overflow: hidden;
  width: 200px;
  height: 100px;
  position: relative;
  float: left;
  margin: 15px;
  box-sizing: border-box;
  transition: border .7s ease;
  border-radius: 3px;
  box-shadow: 
    0 0 10px #000,
    0 0 0 5px #fff;
}
.slidetop{
  background: #fff url(http://azik.me/wp-content/uploads/2012/10/White-Kitten-s.jpg) bottom;
  border-top: solid 100px #ccc;
}

.slidetop:hover{
  border: solid 0px;
}

.slidebottom{
  background: #fff url(http://azik.me/wp-content/uploads/2012/10/White-Kitten-s.jpg) top;
  border-bottom: solid 100px #ccc; 
}

.slidebottom:hover{
  border: solid 0px;
}

.slideleft{
  background: #fff url(http://azik.me/wp-content/uploads/2012/10/White-Kitten-s.jpg) right;
  border-left: solid 200px #ccc; 
}

.slideleft:hover{
  border: solid 0px;
}

.slideright{
  background: #fff url(http://azik.me/wp-content/uploads/2012/10/White-Kitten-s.jpg) left;
  border-right: solid 200px #ccc; 
}

.slideright:hover{
  border: solid 0px;
}

h3{
  font-family: "Courier";
  color: #fff;
  text-align: right;
  margin-right: 50px;
  text-shadow: 2px 2px 3px #000;
}

h3 a{
  color: #fff;
  text-decoration: none;
}