---
id: 6140dc5e13d0c81e7496f182
title: Step 17
challengeType: 0
dashedName: step-17
---

# --description--

You now need to define how your animation should start. To do this, create a `0%` rule within your `@keyframes wheel` rule. The properties you set in this nested selector will apply at the beginning of your animation.

As an example, this would be a `12%` rule:

```css
@keyframes freecodecamp {
  12% {
    color: green;
  }
}
```

# --hints--

Your `@keyframes wheel` rule should have a `0%` selector.

```js
assert(new __helpers.CSSHelp(document).getCSSRules('keyframes')?.[0]?.cssRules?.[0]?.keyText === '0%');
```

# --seed--

## --seed-contents--

```html
<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title> Learn CSS Animations by Building a Ferris Wheel</title>
    <link rel="stylesheet" href="./styles.css">
  </head>
  <body>
    <div class="wheel">
      <span class="line"></span>
      <span class="line"></span>
      <span class="line"></span>
      <span class="line"></span>
      <span class="line"></span>
      <span class="line"></span>

      <div class="cabin"></div>
      <div class="cabin"></div>
      <div class="cabin"></div>
      <div class="cabin"></div>
      <div class="cabin"></div>
      <div class="cabin"></div>
    </div>
  </body>
</html>
```

```css
.wheel {
  border: 2px solid black;
  border-radius: 50%;
  margin-left: 50px;
  position: absolute;
  height: 55vw;
  width: 55vw;
  max-width: 500px;
  max-height: 500px;
}

.line {
  background-color: black;
  width: 50%;
  height: 2px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform-origin: 0% 0%;
}

.line:nth-of-type(2) {
  transform: rotate(60deg);
}
.line:nth-of-type(3) {
  transform: rotate(120deg);
}
.line:nth-of-type(4) {
  transform: rotate(180deg);
}
.line:nth-of-type(5) {
  transform: rotate(240deg);
}
.line:nth-of-type(6) {
  transform: rotate(300deg);
}

.cabin {
  background-color: red;
  width: 20%;
  height: 20%;
  position: absolute;
  border: 2px solid;
  transform-origin: 50% 0%;
}

.cabin:nth-of-type(1) {
  right: -8.5%;
  top: 50%;
}
.cabin:nth-of-type(2) {
  right: 17%;
  top: 93.5%;
}
.cabin:nth-of-type(3) {
  right: 67%;
  top: 93.5%;
}
.cabin:nth-of-type(4) {
  left: -8.5%;
  top: 50%;
}
.cabin:nth-of-type(5) {
  left: 17%;
  top: 7%;
}
.cabin:nth-of-type(6) {
  right: 17%;
  top: 7%;
}

--fcc-editable-region--
@keyframes wheel {

}
--fcc-editable-region--
```
