blue        (0,0) (0,1) (1,1) (1,0) 
brown       (2,0) (0,1) (3,3)
grey        (1,0) (1.5,0.866) (1,1.732) (2,1.732) (2.5,0.866) (2,0)
olive       (0,0) (1,2) (6,3) (4,0)
orange      (0,0) (0,3) (2,3) (2,0)
purple      (0,0) (0,2) (3,1)
red         (0,0) (0.5,0.866) (1,0)