Santa’s Labyrinth

The chompers will appear as walls when they are low, and disappear completely when they are above the robot's visual range. That means if they are slow enough, we can get through them with something like

#v0

# Inefficient busy-wait. Even in (v1), we don't have a way
# to express "wait until you see X" yet.
do wait_for_an_opening
    touch wall
    if yes repeat
    finish
end wait_for_an_opening

do wait_for_the_chomp
    touch wall
    if no repeat
    finish
end wait_for_the_chomp

do wait_and_run
    forward # right next to the chomper
    do wait_for_the_chomp
    do wait_for_an_opening
    forward
    forward # past the chomper
end wait_and_run

do wait_and_run
do wait_and_run
do wait_and_run