Can you please tell me how to solve this problem?

Question

Algorithms

Tell me how you can solve this problem

There is no need for a ready-made solution, just push me in the right solution or some kind of example. I just don't know how to approach the problem.

Answer 1

Use pseudographic characters from Unicode.
Pay attention to the fact that around the rectangular pattern in the center there is always a light gray background of patches the size of one rectangle.