Learn How Bezier Curves Work NaoG

Tell us what’s happening:
NaoG found I had an extra brace. ThankYou, NaoG. Works now.

Your code so far


    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 { 
    left: 27%;
    animation-timing-function: linear;
  #ball2 { 
    left: 56%;
    animation-timing-function: cubic-bezier(0.25, 0.25, 0.75, 0.75);

@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 (Macintosh; Intel Mac OS X 10_13_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36.

Link to the challenge:

You did not follow the directions. The instructions state:

For the element with the id of ball1, change the value of the animation-timing-function property from linear to its equivalent cubic-bezier function value.

Key word is “ball1”. Instead you changed the animiation-timing-function property of ball2.