# A Picobot program that can fill an empty room
# SAMPLE SOLUTION: DO NOT DISTRIBUTE

# States 0 and 1: move to the top left

# State 0: move left
0 **x* -> W 0   # go all the way to the left
0 **W* -> X 1   # can't go left anymore, so try to go up

# State 1: move up
1 x*** -> N 1  # go all the way to the top
1 N**x -> S 2  # can't go up any more, so try to go down

# States 2 and 3: fill from top to bottom, left to right

# State 2: fill this column to the bottom
2 ***x -> S 2  # go all the way to the bottom
2 *x*S -> E 3  # can't go down anymore, so try to go right

# State 3: fill this column to the top
3 x*** -> N 3  # go all the way to the top
3 Nx** -> E 2  # can't go up anymore, so try to go right