---
id: 5d822fd413a79914d39e98e9
title: Part 33
challengeType: 0
isBeta: true
---
## Description
I see some code that can be optimized. Move the `position` and `top` properties and values from `foreground-buildings` to `background-buildings`. Then select both `background-buildings` and `foreground-buildings` there, effectively applying those styles to both of the elements. You can use a comma (`,`) to separate selectors like this: `selector1, selector2`.
## Instructions
## Tests
```yml
tests:
- text: test-text
testString: assert($(".background-buildings").css("position") === "absolute" && $(".background-buildings").css("top") === "0px" && /(\.background-buildings\s*,\s*\.foreground-buildings|\.foreground-buildings\s*,\s*\.background-buildings)/g.test(code));
```
## Challenge Seed
```html
freeCodeCamp Skyline Project
```