Please Help i don´t see the mistake: Learn How the CSS @keyframes and animation Properties Work

I make the solution and i check witn the video solution and I still have problems and i cann´t see them

Your code so far

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

#rect {
animation-name: rainwob;
animation-duration: 3s;

@keyframes rainwob {
0% {
  background-color: blue;
  background-color: green;  
100% {
  background-color: yellow;

<div id="rect"></div>
  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.190 Safari/537.36.

Challenge: Learn How the CSS @keyframes and animation Properties Work

Link to the challenge:

it doesn’t seem you are using the required name

Create an animation for the element with the id rect , by setting the animation-name to rainbow and the animation-duration to 4 seconds.

It asks for rainbow, you have

also it asks for animation duration of 4s

Yes! i see again and now i check that, Thaks!!