R B R B R B R B B R B R B R B R R B R B R B R B B R B R B R B R R B R B R B R B B R B R B R B R R B R B R B R B B R B R B R B R
: Check if the row index is in the top three (0, 1, 2) or the bottom three (5, 6, 7). If it is, change those elements to 1 . 9.1.6 checkerboard v1 codehs