<div class="app">
  <div class="icon22">¥</div>
</div>

.app{
  width: 100%;
  height: 100vh;
  background-color: #ffffff;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.icon22{
  width: 72px;
  height: 72px;
  line-height: 72px;
  text-align: center;
  color: #daa500;
  font-size: 40px;
  font-weight: 900;
  background-color: #ffee00;
  border-radius: 50%;
  box-shadow: inset 0 0 0 4px #ffee00,inset 0 0 0 5px #daa500,0 5px 12px rgba(0,0,0,0.2);
  animation: ani-icon22 5s ease infinite;
}
@keyframes ani-icon22{
  0%{
    transform: rotateY(0deg);
    animation-timing-function: cubic-bezier(0.5, 0, 1, 0.5);
  }
  50%{
    transform: rotateY(900deg);
    animation-timing-function: cubic-bezier(0, 0.5, 0.5, 1);
  }
  100%{
    transform: rotateY(1800deg);
    animation-timing-function: cubic-bezier(0.5, 0, 1, 0.5);
  }
}