Help with a Matrix nxn with black and white input

[Rosko]

You need clarity in your mind. Please think about your problem, decompose it into smaller problems and solve them one at the time. If problem encountered provide code and ask for help.

Do your really want always move to the left: 'move to the left if the square is black or to the left if it is white'

I'm sorry I don't speak English very well so when I translated it I didn't realize the error, It should say left if it's black and right if it's white.