---
id: 6140dd77e0bc5a1f70bd7466
title: 步驟 18
challengeType: 0
dashedName: step-18
---
# --description--
給 `0%`的規則一個 `transform` 屬性，設置爲 `rotate(0deg)`。 這將以不旋轉的方式開始動畫。
# --hints--
你的 `0%` 選擇器應該有一個 `transform` 屬性，設置爲 `rotate(0deg)`。
```js
assert(new __helpers.CSSHelp(document).getCSSRules('keyframes')?.[0]?.cssRules?.[0]?.style?.transform === 'rotate(0deg)');
```
# --seed--
## --seed-contents--
```html
Ferris Wheel
```
```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 {
0% {
}
}
--fcc-editable-region--
```