body{
  background-color:#333;
}
.glitter{
  margin:auto;
  margin-top:100px;
  width:254px;
  height:254px;
  background-image: url('http://cl.ly/image/3b2b2V431E1h/images.jpeg');
  background-repeat: no-repeat;
  background-size: 200% 200%;
  background-position: 100% 100%;
  -webkit-animation: square 1s linear infinite;
  -ms-animation: square 1s linear infinite;
  animation: square 1s linear infinite;
  text-align:center;
}

@-webkit-keyframes square {
  0% { background-position: 0 0; }
  25% { background-position: 100% 0; }
  50% { background-position: 100% 100%; }
  75% { background-position: 0 100%; }
  100% { background-position: 0 0; }
}

@-ms-keyframes square {
  0% { background-position: 0 0; }
  25% { background-position: 100% 0; }
  50% { background-position: 100% 100%; }
  75% { background-position: 0 100%; }
  100% { background-position: 0 0; }
}

@keyframes square {
  0% { background-position: 0 0; }
  25% { background-position: 100% 0; }
  50% { background-position: 100% 100%; }
  75% { background-position: 0 100%; }
  100% { background-position: 0 0; }
}