---
id: 5d822fd413a79914d39e98f2
title: Part 42
challengeType: 0
dashedName: part-42
---
# --description--
Add the new `bb1-window` class to the `bb1a`, `bb1b`, and `bb1c` elements. This will apply the gradient to them.
# --hints--
test-text
```js
assert(
$('.bb1a.bb1-window').length === 1 &&
$('.bb1b.bb1-window').length === 1 &&
$('.bb1c.bb1-window').length === 1
);
```
# --seed--
## --seed-contents--
```html
freeCodeCamp Skyline Project
```
# --solutions--
```html
freeCodeCamp Skyline Project
```