Learn How the CSS @keyframes and animation Properties Work. Is this right?

Tell us what’s happening:

Your code so far

  div {
    height: 40px;
    width: 70%;
    background: black;
    margin: 50px auto;
    border-radius: 5px;

  #rect {
    animation-name: rainbow;
    animation-duration: 4s;
  @keyframes {
    0% {
      background-color: blue;
    50% {
      background-color: green;
    100% {
      background-color: yellow;
<div id="rect"></div>

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36.

Link to the challenge:

The @keyframes keyword is followed by a name (referenced by the animation-name property)