@-webkit-keyframes rotate {
    from {-webkit-transform: rotate(0deg);
    }
    to {-webkit-transform: rotate3d(0,1,0,360deg);
    }
}
#centrador{
  position: fixed;
  width: 100%;
  height: 100%;

  padding: auto;
  text-align: center;
  background-position: center center;
  background-size: cover;
  background-repeat: no-repeat;
  z-index:99;
}
#centrador:before {
	content:'';
	position: absolute;
    top: 0;
	bottom: 0;
	left: 0;
	right: 0;
	background-color: rgba(0,0,0,0.6);
} 

#imagen{
      /* transform: rotate3d(1,0,0,60deg); */
    -webkit-animation: 3s rotate linear infinite;
    animation: 3s rotate linear infinite;
    -webkit-transform-origin: 50% 50%;
    transform-origin: 50% 50%;
    position: fixed;
    width: 100px;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    margin: auto;
    z-index: 100;
}