css中animation小例子

Sure, I can help you with a CSS animation example. Here is an example of animating a div's background color:

div {
  width: 100px;
  height: 100px;
  background-color: red;
  animation: change-color 2s infinite;
}

@keyframes change-color {
  0% {
    background-color: red;
  }
  50% {
    background-color: blue;
  }
  100% {
    background-color: green;
  }
}

This will animate the background color of the div from red to blue to green and repeat indefinitely.