---
id: 5d822fd413a79914d39e98d1
title: Part 9
challengeType: 0
isHidden: true
---
## Description
Give your background buildings element a `width` and `height` of `100%` to make it the full width and height of its parent, the body.
## Instructions
## Tests
```yml
tests:
- text: test-text
testString: const bb = code.match(/\.background-buildings\s*{[\s\S]+?[^}]}/g)[0]; assert(/width\s*:\s*100%\s*(;|})/g.test(bb) && /height\s*:\s*100%\s*(;|})/g.test(bb))
```
## Challenge Seed
```html
freeCodeCamp Skyline Project
```