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---
id: 6140f4b5c1555a2960de1e5f
title: Step 22
challengeType: 0
dashedName: step-22
---
# --description--
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Crea un'altra regola `@keyframes` con il nome `cabins` . Usa le stesse proprietà di `@keyframes wheel` , copiando entrambe le regole `0%` e `100%` , ma imposta la proprietà `transform` del selettore `100%` su `rotate(-360deg)` .
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# --hints--
Dovresti avere una regola `@keyframes` .
```js
assert(new __helpers.CSSHelp(document).getCSSRules('keyframes')?.length === 2);
```
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La nuova regola `@keyframes` dovrebbe avere il nome `cabins` .
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```js
const rules = new __helpers.CSSHelp(document).getCSSRules('keyframes');
assert(rules?.[0]?.name === 'cabins' || rules?.[1]?.name === 'cabins');
```
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La nuova regola `@keyframes` dovrebbe trovarsi dopo la regola `@keyframes wheel` .
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```js
assert(new __helpers.CSSHelp(document).getCSSRules('keyframes')?.[1]?.name === 'cabins');
```
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Non dovresti cambiare il nome della regola `@keyframes wheel` .
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```js
assert(new __helpers.CSSHelp(document).getCSSRules('keyframes')?.[0]?.name === 'wheel');
```
La regola `@keyframes cabins` dovrebbe avere un selettore `0%` .
```js
assert(new __helpers.CSSHelp(document).getCSSRules('keyframes')?.[1]?.cssRules?.[0]?.keyText === '0%');
```
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Il selettore `0%` dovrebbe avere una proprietà `transform` con il valore `rotate(0deg)` .
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```js
assert(new __helpers.CSSHelp(document).getCSSRules('keyframes')?.[1]?.cssRules?.[0]?.style?.transform === 'rotate(0deg)');
```
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La regola `@keyframes cabins` dovrebbe avere un selettore `100%` .
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```js
const rules = new __helpers.CSSHelp(document).getCSSRules('keyframes')?.[1]?.cssRules
assert(rules?.[0]?.keyText === '100%' || rules?.[1]?.keyText === '100%');
```
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Il selettore `100%` dovrebbe trovarsi dopo il selettore `0%` .
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```js
assert(new __helpers.CSSHelp(document).getCSSRules('keyframes')?.[1]?.cssRules?.[1]?.keyText === '100%')
```
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Il selettore `100%` dovrebbe avere una proprietà `transform` impostata su `rotate(-360deg)` .
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```js
assert(new __helpers.CSSHelp(document).getCSSRules('keyframes')?.[1]?.cssRules?.[1]?.style?.transform === 'rotate(-360deg)')
```
# --seed--
## --seed-contents--
```html
<!DOCTYPE html>
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< html lang = "en" >
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< head >
< meta charset = "UTF-8" >
< title > 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;
animation-name: wheel;
animation-duration: 10s;
animation-iteration-count: infinite;
animation-timing-function: linear;
}
.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%;
}
@keyframes wheel {
0% {
transform: rotate(0deg);
}
100% {
transform: rotate(360deg);
}
}
--fcc-editable-region--
--fcc-editable-region--
```
