Если Вы про координатное кодирование, то вот:
(2; 7) (2; 1) (5; 7) (5; 1) (6; 1) (6; 7) (8; 1) (8; 7) (9; 1) (9; 4) (9; 7) (10; 1) (10; 4) (10; 7) (12; 1) (12; 7) (13; 1) (13; 7) (14; 1) (14; 7) (15; 1) (15; 7) (17; 1) (17.5; 3) (19; 3) (20.5; 3) (21; 1)