#icon {width:64px; height:64px;}

#icon img{
 -webkit-transition-duration: 0.8s;
 -moz-transition-duration: 0.8s;
 -o-transition-duration: 0.8s;
 transition-duration: 0.8s;

 -webkit-transition-property: -webkit-transform;
 -moz-transition-property: -moz-transform;
 -o-transition-property: -o-transform;
 transition-property: transform;

 overflow:hidden;

}