Boxes are important to nail in CSS so I will be training here

So if I am able to make this box pink and tall

And this one violet and flat

I guess I'll have the minimum of understanding.

I want to have these boxes here several times. Once beside one another. Once below one another. And once overlapping.

besides eachother:

below one another:

overlapping

So if I am able to make this box pink and tall

And this one violet and flat