@keyframes rotate {
  from { transform: rotate( 0deg ); }
  to   { transform: rotate( 360deg ); }
}

@-webkit-keyframes rotate {
  from { -webkit-transform: rotate( 0deg );   }
  to   { -webkit-transform: rotate( 360deg ); }
}

.loading {
  -webkit-animation-name: rotate;
  -webkit-animation-duration: 0.5s;
  -webkit-animation-iteration-count: infinite;
  -webkit-animation-timing-function: linear;
  animation-name: rotate;
  animation-duration: 0.5s;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
}