@keyframes bounce {
  0%, 30%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  20% {
    transform: translateY(-30px);
  }
  40% {
    transform: translateY(-15px);
  }
}

#wangu {
  animation-name: bounce;
  animation-duration: 5s;
  animation-iteration-count: infinite;
}