怎么做一个简单的loading

<div class="container" />

.container {
  height: 100px;
  width: 100px;
  border: 10px solid whitesmoke;
  border-top-color: gold;
  border-radius: 50%;
  animation: spin infinite 1.4s linear;
  display: inline-block;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }

  to {
     transform: rotate(360deg);
  }
}