R 0 2 r 2

R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2
R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2
R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2R 0 2 r 2