- Write the `generateClasses` function which creates a `<style>` tag in the `<head>` tag and generates, for each color of `colors`, a class setting the `background` attribute and taking the color as value, like following:
- Write the `generateColdShades` function which creates a `<div>` for each color of the `colors` array whose name contains `aqua`, `blue`, `turquoise`, `green`, `cyan`, `navy` or `purple`.\
Each `<div>` must have the corresponding generated class and display the name of the color, like following:
```html
<divclass="indianred">indianred</div>
```
- The function `choseShade` is triggered when clicking on a `div`.\
Write the body of this function, which receives the shade of the clicked element as argument, and replaces all the other elements class by the chosen shade.
