add switch (0,0) -> (5,0),(0,5)
add track (-2,0) -> (0,0)
add track (7,0) -> (5,0)
add track (0,7) -> (0,5)
create train-set T1 Alpha 1 true true
create train-set T1 Beta 1 true true
create train-set T1 Delta 1 true true
create train-set T1 Gamma 1 true true
add train 1 T1-Alpha
add train 2 T1-Beta
add train 3 T1-Delta
add train 4 T1-Gamma
set switch 1 position (5,0)
put train 1 at (-1,0) in direction 1,0
put train 2 at (6,0) in direction -1,0
put train 3 at (0,6) in direction 0,-1
put train 4 at (2,0) in direction 1,0
step 1
set switch 1 position (5,0)
step 0
exit