テンプレート:テスト/style.css

div {
  position: absolute;
}
.bound {
  animation: bound .3s ease infinite alternate;
}
@keyframes bound {
  0% {transform: translateY(0px);}
  100% {transform: translateY(-50px);}
}
.spin {
  animation: spin .6s ease infinite alternate;
}
@keyframes spin {
  0% {transform: rotate(0deg);}
  50% {transform: rotate(180deg);}
  100% {transform: rotate(360deg);}
}