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****## Mouse trap
### Instructions
Develop a trap to capture the elements when the mouse is getting too close to the center of the page.
Create the following functions:
- `createCircle`: make it fire on every click on the page, and create a `div` at the position of the mouse on the screen, setting its `background` to `white` and its class to `circle`.
- `moveCircle`: make it fire when the mouse moves, and get the last circle created and makes it move along with the mouse.
- `setBox`: which creates a box with the class `box` in the center of the page. When a circle is inside that box, it has to be purple (use the CSS global variable `var(--purple)` as its `background`). Once a circle enters the box, it is trapped inside and cannot escape.
> Hint: Be careful, a circle cannot overlap the box which has walls of `1px`. It has to be trapped **strictly** inside.
### Provided files
### Files
You only need to create & submit the JS file `mouse-trap.js`; we're providing you the following file to download and test locally:
- the HTML file [mouse-trap.html](./mouse-trap.html) to open in the browser, which includes:
- the JS script which will enable you to run your code.
- feel free to use the CSS file [mouse-trap.data.css](./mouse-trap.data.css) as it is or you can also modify it.
### Expected result
You can see an example of the expected result [here](https://youtu.be/qF843P-V2Yw)
### Notions
- [addEventListener](https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener)
- [removeEventListener](https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/removeEventListener)
- [Mouse event](https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/MouseEvent)
- [click](https://developer.mozilla.org/en-US/docs/Web/API/Element/click_event)
- [mousemove](https://developer.mozilla.org/en-US/docs/Web/API/Element/mousemove_event)
- [clientX](https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/clientX)
- [clientY](https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/clientY)
- [getBoundingClientRect](https://developer.mozilla.org/en-US/docs/Web/API/Element/getBoundingClientRect)