テンプレート:テスト/style.css

.fall {
  animation:
  7s ease-in infinite normal fall,
  10s linear infinite alternate rotate
}
@keyframes fall {
  0% {
  	transform: translateY(0);
  	opacity:100;
  }
  100% {
  	transform: translateY(100vh);
  	opacity: 0;
  }
}
@keyframes rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}