---
id: 5d822fd413a79914d39e98f1
title: Step 41
challengeType: 0
dashedName: step-41
---
# --description--
You want to add the same gradient to the next two sections. Instead of doing that, create a new class called `bb1-window`, and move the `height` and `background` properties and values from `.bb1a` to the new class.
# --hints--
You should create a new class declaration called `bb1-window`.
```js
assert.exists(new __helpers.CSSHelp(document).getStyle('.bb1-window'));
```
You should move the `height` property and value from `.bb1a` to `.bb1-window`.
```js
assert.isEmpty(new __helpers.CSSHelp(document).getStyle('.bb1a')?.height);
assert.equal(new __helpers.CSSHelp(document).getStyle('.bb1-window')?.height, '10%');
```
You should move the `background` property and value from `.bb1a` to `.bb1-window`.
```js
assert.isEmpty(new __helpers.CSSHelp(document).getStyle('.bb1a')?.background);
assert.equal(new __helpers.CSSHelp(document).getStyle('.bb1-window')?.getPropVal('background', true), 'linear-gradient(var(--building-color1),var(--window-color1))');
```
You should not move the `background-color` property from `.bb1a`.
```js
assert.notEmpty(new __helpers.CSSHelp(document).getStyle('.bb1a')?.backgroundColor);
```
You should not move the `width` property from `.bb1a`.
```js
assert.notEmpty(new __helpers.CSSHelp(document).getStyle('.bb1a')?.width);
```
# --seed--
## --seed-contents--
```html