---
id: 5d822fd413a79914d39e98f1
title: Part 41
challengeType: 0
isHidden: true
---
## Description
You want to add the same gradient to the next two sections. But 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.
## Instructions
## Tests
```yml
tests:
- text: test-text
testString: const bb1wStyle = code.match(/\.bb1-window\s*{[\s\S]+?[^}]}/g)[0]; assert(/height\s*:\s*10%\s*(;|})/g.test(bb1wStyle) && /background\s*:\s*linear-gradient\(\s*var\(\s*--building-color1\s*\)\s*,\s*var\(\s*--window-color1\s*\)\s*\)\s*(;|})/g.test(bb1wStyle));
```
## Challenge Seed
```html
freeCodeCamp Skyline Project
```