Familiar scrolling of the colored background along both coordinates :)

Hello, All What theoretical ideas might there be in this regard? Most interesting represent any clever and non-standard solutions :) Drawing - on a currently unused screen, the background is made up of an arbitrary number of colored tiles of the same size. By the way, what size of tiles is better to use in terms of speed? As I understand it, it’s worth implementing separate horizontal, vertical and diagonal scrolling, right? Or is it better to do all 8 directions separately?