gL: -7
gR: 7
gU: -7
gO: 7
A: (0 | -1)
B: (4 | -1)
C: (4 | 1)
D: (0 | 1)
Vieleck1 = Polygon({A, B, C, D})
A' = (0, -1)
B' = (4, -1)
C' = (4, 1)
D' = (0, 1)
Vieleck2 = Polygon({A', B', C', D'})