UseInterval and coordinate system method

[Ivo-Evans]

The useInterval function is really interesting, it might be a good one to talk about in the presentation.

[Joepock123]

The callback and saved callback in the second array argument! is really interesting. What do they do? Also really interested how the coordinate system works in const moveSnake = () =>. You are using the position propery and let head is a array of x and y % values?