---
id: 5d822fd413a79914d39e992e
title: Part 101
challengeType: 0
dashedName: part-101
---
# --description--
Fill in the windows with your secondary color for this building. Also add a `margin` of `10%` to give the windows some space.
# --hints--
test-text
```js
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)
);
```
# --seed--
## --seed-contents--
```html
freeCodeCamp Skyline Project
```
# --solutions--
```html
freeCodeCamp Skyline Project
```