SOURCE

<div class="sk-rotating-plane"></div>

body{
  background-color: #d35400;
}
.sk-rotating-plane {
  width: 40px;
  height: 40px;
  background-color: #FFF;
  margin: 40px auto;
  -webkit-animation: sk-rotatePlane 1.2s infinite ease-in-out;
          animation: sk-rotatePlane 1.2s infinite ease-in-out; }

@-webkit-keyframes sk-rotatePlane {
  0% {
    -webkit-transform: perspective(120px) rotateX(0deg) rotateY(0deg);
            transform: perspective(120px) rotateX(0deg) rotateY(0deg); }
  50% {
    -webkit-transform: perspective(120px) rotateX(-180.1deg) rotateY(0deg);
            transform: perspective(120px) rotateX(-180.1deg) rotateY(0deg); }
  100% {
    -webkit-transform: perspective(120px) rotateX(-180deg) rotateY(-179.9deg);
            transform: perspective(120px) rotateX(-180deg) rotateY(-179.9deg); } }

@keyframes sk-rotatePlane {
  0% {
    -webkit-transform: perspective(120px) rotateX(0deg) rotateY(0deg);
            transform: perspective(120px) rotateX(0deg) rotateY(0deg); }
  50% {
    -webkit-transform: perspective(120px) rotateX(-180.1deg) rotateY(0deg);
            transform: perspective(120px) rotateX(-180.1deg) rotateY(0deg); }
  100% {
    -webkit-transform: perspective(120px) rotateX(-180deg) rotateY(-179.9deg);
            transform: perspective(120px) rotateX(-180deg) rotateY(-179.9deg); } }