---
id: 5d822fd413a79914d39e992e
title: Part 102
challengeType: 0
isHidden: true
---
## Description
Fill in the windows with your secondary color for this building. Also add a `margin` of `10%` to give the windows some space.
## Instructions
## Tests
```yml
tests:
- text: test-text
testString: const fb4w = code.match(/\.fb4-window\s*{[\s\S]+?[^}]}/g)[0]; assert(/background-color\s*:\s*var\(\s*--window-color1\s*\)\s*(;|})/g.test(fb4w) && /margin\s*:\s*10%\s*(;|})/g.test(fb4w));
```
## Challenge Seed
```html
freeCodeCamp Skyline Project
```