<template>
<div class="box">
  <div class="plane"></div>
</div>
</template>

<style scoped>
.box {
  perspective: 120px;
}

.plane {
  width: 2em;
  height: 2em;
  background-color: #fc2f70;
  transform: rotate(0);
  animation: flip 1s infinite;
}

@keyframes flip {
  50% {
    transform: rotateY(180deg);
  }
  100% {
    transform: rotateY(180deg) rotateX(180deg);
  }
}
</style>