---
id: 60a3e3396c7b40068ad6997a
title: Step 17
challengeType: 0
dashedName: step-17
---
# --description--
Write a new rule that targets `.one` and set its `width` to 425 pixels.
# --hints--
You should have a `.one` selector.
```js
const hasOne = new __helpers.CSSHelp(document).getStyle('.one');
assert(hasOne);
```
You should set the `width` property to `425px`.
```js
const hasWidth = new __helpers.CSSHelp(document).getCSSRules().some(x => x.style.width === '425px');
assert(hasWidth);
```
Your `.one` element should have a `width` value of `425px`.
```js
const oneWidth = new __helpers.CSSHelp(document).getStyle('.one')?.getPropertyValue('width');
assert(oneWidth === '425px');
```
# --seed--
## --seed-contents--
```css
.canvas {
width: 500px;
height: 600px;
background-color: #4d0f00;
}
.frame {
border: 50px solid black;
width: 500px;
padding: 50px;
margin: 20px auto;
}
--fcc-editable-region--
--fcc-editable-region--
```
```html
Rothko Painting