x & block pattern

Can anyoune please give a hint for the starting point?

From top left to down right are squares 2x2, the image is symmetrically about this axis.

Thank you :) I was totally lost.

Easy once you realize the pattern.

No chance to solve it.

Do three diagonals of 2x2 squares per Zdejo43, and then everything after flows logically.

Pas trouvé