---
id: 5d822fd413a79914d39e98d1
title: Part 9
challengeType: 0
dashedName: part-9
---
# --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.
# --hints--
test-text
```js
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)
);
```
# --seed--
## --seed-contents--
```html
freeCodeCamp Skyline Project
```
# --solutions--
```html
freeCodeCamp Skyline Project
```