.rocket {
  animation: moveRocket 3s alternate infinite;
}

@keyframes moveRocket {
  0% {
    transform: translateX(-5px);
  }
  25% {
    transform: translateY(20px);
  }
  50% {
    transform: translateX(-5px);
  }
  100% {
    transform: translateY(20px);
  }
}