x = left and right
y up and down
A (x,y) coordinate system would work. The first number (x) not able to pass 3 (0-3) (which is the fourth element), same with the next number (y).
y up and down
A (x,y) coordinate system would work. The first number (x) not able to pass 3 (0-3) (which is the fourth element), same with the next number (y).
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