R 1 2

R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2
R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2
R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2R 1 2