body, html {
  height: 100%;
}
*{
	margin: 0px;
	padding: 0px;
}
.falling-leaves {
  position: absolute;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

.leaf-scene {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 100%;
  -webkit-transform-style: preserve-3d;
          transform-style: preserve-3d;
}
.leaf-scene div {
  position: absolute;
  top: 0;
  left: 0;
  width: 47px;
  height: 17px;
  background: url(sy.png) no-repeat;
  background-size: 100%;
  -webkit-transform-style: preserve-3d;
          transform-style: preserve-3d;
  -webkit-backface-visibility: visible;
          backface-visibility: visible;
}