.iou {
  animation: Float 2s linear infinite;
  /*position: relative;*/
  transform: translatery;
  transform: translatey(0px);
  animation: Float 6s ease-in-out infinite;
  animation: animation: float 6s ease-in-out infinite;
  /*left: 0;*/
  /*bottom: 0;*/
}

@keyframes Float {
  0% {
    box-shadow: 0 5px 15px 0px rgba(0,0,0,0.6);
    transform: translatey(0px);
  }
  50% {
    box-shadow: 0 25px 15px 0px rgba(0,0,0,0.2);
    transform: translatey(-20px);
  }
  100% {
    box-shadow: 0 5px 15px 0px rgba(0,0,0,0.6);
    transform: translatey(0px);
  }
}