AnimationTiming Function linear and ease-in

Tell us what’s happening:
I typed in the codes for the animation timing function linear and ease-in. the video in the help menu the cursor is circling and the video feed pauses. I put in the coding and ball1 and ball2 are doing the animation timing where the balls slow up as it get to the bottom of the screen but when I hit run test button it says incorrect. I need help.

Your code so far


.balls {
  border-radius: 50%;
  background: linear-gradient(
  position: fixed;
  width: 50px;
  height: 50px;
  margin-top: 50px;
  animation-name: bounce;
  animation-duration: 2s;
  animation-iteration-count: infinite;
#ball1 {
  animation-timing-function: linear;
#ball2 {
  animation-timing-function: ease-out;

@keyframes bounce {
  0% {
    top: 0px;
  100% {
    top: 249px;


<div class="balls" id="ball1"></div>
<div class="balls" id="ball2"></div>

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 Edge/18.18363.

Challenge: Change Animation Timing with Keywords

Link to the challenge:

See my reply here: Corrected code. still no luck. the curriculum is stelling me this code is wrong and will not allow me to complete challenge. so frustrated

Try refreshing the page. I had the same issue. I skip the lesson and tried again a day or so later. The next few lessons you may find have the same problems as of this writing the FCC is looking into the matter. Sign- Happy coding.