---
id: 5d822fd413a79914d39e990b
title: Part 67
challengeType: 0
isHidden: true
---
## Description
Add the new `building-wrap` class to the `bb1` and `bb4` elements. This will apply the centering properties to the buildings that need it.
## Instructions
## Tests
```yml
tests:
- text: test-text
testString: assert($(".bb1.building-wrap").length === 1 && $(".bb4.building-wrap").length === 1);
```
## Challenge Seed
```html
freeCodeCamp Skyline Project
```