freeCodeCamp/curriculum/challenges/english/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
---

## Description
<section id='description'>
<strong>Objective:</strong> Build a <a href='https://codepen.io' target='_blank'>CodePen.io</a> app that is functionally similar to this: <a href='https://codepen.io/freeCodeCamp/full/eyLYXE' target='_blank'>https://codepen.io/freeCodeCamp/full/eyLYXE</a>.
<strong>Rule #1:</strong> Don't look at the example project's code. Figure it out for yourself.
<strong>Rule #2:</strong> Fulfill the below <a href='https://en.wikipedia.org/wiki/User_story' target='_blank'>user stories</a>. Use whichever libraries or APIs you need. Give it your own personal style.
<strong>User Story:</strong> I can click or drag the mouse cursor to color the circles.
<strong>User Story:</strong> I can double-click on a colored circle to remove the color.
<strong>User Story:</strong> I can click on a colored circle to change its color.
<strong>User Story:</strong> I should get a circle of different color on each click.
<strong>User Story:</strong> I can click on the 'Reset' button to remove the recent color.
<strong>User Story:</strong> 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'>freeCodeCamp forum</a>.
</section>

## Instructions
<section id='instructions'>

</section>

## Tests
<section id='tests'>

```yml
tests: []

```

</section>

## Challenge Seed
<section id='challengeSeed'>

</section>

## Solution
<section id='solution'>

```js
// solution required
```

</section>