L1 1 0 L1
R2 0 3 R2
V1 4 0 step
G1 5 3 6 1 x_1
E1 1 4 6 1 x_1 0
R1 6 1 R1
C1 4 7 C1
R3 7 6 R3
C2 7 5 C2