---
id: 5d822fd413a79914d39e98db
title: Part 19
challengeType: 0
---
## Description
Give the new buildings `width` and `height` properties of: `10%` and `50%` for `bb2`, `10%` and `55%` for `bb3`, and `11%` and `58%` for `bb4`. You will be using almost all percent based units and some Flexbox for this project, so everything will be completely responsive.
## Instructions
## Tests
```yml
tests:
- text: test-text
testString: const bb2 = code.match(/\.bb2\s*{[\s\S]+?[^}]}/g)[0]; const bb3 = code.match(/\.bb3\s*{[\s\S]+?[^}]}/g)[0]; const bb4 = code.match(/\.bb4\s*{[\s\S]+?[^}]}/g)[0]; assert(/width\s*:\s*10%\s*(;|})/g.test(bb2) && /height\s*:\s*50%\s*(;|})/g.test(bb2) && /width\s*:\s*10%\s*(;|})/g.test(bb3) && /height\s*:\s*55%\s*(;|})/g.test(bb3) && /width\s*:\s*11%\s*(;|})/g.test(bb4) && /height\s*:\s*58%\s*(;|})/g.test(bb4));
```
## Challenge Seed
```html
freeCodeCamp Skyline Project
```