.down {
  font-size: 42px;
  color: #fff;
  bottom: 27px;
  position: absolute;
  left: 50%;
  margin-left: -68px;
  animation-name:arrow;
  animation-duration:1s;
  animation-timing-function:linear;
  animation-delay:0s;
  animation-iteration-count:infinite;
  animation-direction:normal;
  animation-play-state:running;
  -webkit-animation-name:arrow;
  -webkit-animation-duration:1s;
  -webkit-animation-timing-function:linear;
  -webkit-animation-delay:0s;
  -webkit-animation-iteration-count:infinite;
  -webkit-animation-direction:normal;
  -webkit-animation-play-state:running;
}

@keyframes arrow
	{
	0%   {bottom:0;}
	75% {bottom:30px;}
	100% {bottom:0;}
	}
@-webkit-keyframes arrow
	{
	0%   {bottom:0;}
  75% {bottom:30px;}
	100% {bottom:0;}
  }