## 🌟 Diamon

### Instructions

Create a `diamon` function that takes a string and a number as parameters
and returns a diamond shape constructed by 2 arguments:
 - the characters (as a string) to be repeated
 - the size of a side (as a number)

It is just like pyramid + a reversed pyramid

### Output example

- `*` character and side of 5 :

```
    *
   ***
  *****
 *******
*********
 *******
  *****
   ***
    *
```

> No new line in last line

### Notions

- [nan-academy.github.io/js-training/examples/loops](https://nan-academy.github.io/js-training/examples/loops.js)
- [nan-academy.github.io/js-training/examples/recursion](https://nan-academy.github.io/js-training/examples/recursion.js)
