Coordinates (insert into appropriate positions in the function):
x: 21
y: 5
Level: 13
party:setPosition(x, y, direction (can be 0), 0, level)
party:setPosition(21, 5, 1, 0, 13)
The whole level should be solved without the use of a light spell or a torch (for your information as it may be that you won't get punished for doing so if you teleport past the trigger).
The rest should work normal (at least I hope so).