Create Movement Using CSS Animation - Solution is not working

Tell us what’s happening:

Something is amiss here!!!

Your code so far


<style>
  div {
    height: 40px;
    width: 70%;
    background: black;
    margin: 50px auto;
    border-radius: 5px;
    position: relative;
  }

#rect {
  animation-name: rainbow;
  animation-duration: 4s;
}

@keyframes rainbow {
  0% {
    background-color: blue;
    top : 0px;
    left: 0px;
    
  }
  50% {
    background-color: green;
    top : 50px;
    left: 25px; 
  }
  100% {
    background-color: yellow;
    top : 0px;
    left: -25px;
  }
}
</style>

<div id="rect"></div>

Your browser information:

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36.

you have changed the original code. the one you were specifically told to not change.
don’t add spaces before the colon.