freeCodeCamp/curriculum/challenges/german/10-coding-interview-prep/take-home-projects/build-a-light-bright-app.md

---
id: 5a5d02bd919fcf9ca8cf46cb
title: Build a Light-Bright App
challengeType: 3
forumTopicId: 302350
dashedName: build-a-light-bright-app
---

# --description--

**Objective:** Build an app that is functionally similar to this: <https://codepen.io/freeCodeCamp/full/eyLYXE>.

**Rule #1:** Don't look at the example project's code. Figure it out for yourself.

**Rule #2:** Fulfill the below user stories and get all of the tests to pass. Use whichever libraries or APIs you need. Gib dem Ganzen deinen persönlichen Stil.

**User Story:** I can click or drag the mouse cursor to color the circles.

**User Story:** I can double-click on a colored circle to remove the color.

**User Story:** I can click on a colored circle to change its color.

**User Story:** I should get a circle of different color on each click.

**User Story:** I can click on the 'Reset' button to remove the recent color.

**User Story:** I can click on the 'Reset All' button to remove all the colors from the circles.

When you are finished, include a link to your project on CodePen and click the "I've completed this challenge" button.

You can get feedback on your project by sharing it on the <a href="https://forum.freecodecamp.org/c/project-feedback/409" target="_blank" rel="noopener noreferrer nofollow">freeCodeCamp forum</a>.

# --solutions--

```js
// solution required
```