<style>
.container {
  position: fixed;
  right: 20px;
  top: 0;
  width: 100px;
  height: 100vh;
  pointer-events: none;
}
.elevator-img {
  position: absolute;
  width: 100px;
  height: auto;
  top: 0;
  animation: moveDown 4s ease-in-out infinite alternate;
}
@keyframes moveDown {
  0% {
    top: 0;
  }
  100% {
    top: calc(100vh - 80px);
  }
}
</style>
