which bit!!??
You have to turn the tiles around to get the little head to follow the track to the other hole by the door!
Then turn the lights off, get the 3 loose tiles in the wall!
Go to other room, lift bridge, insert tiles into box.
Pull the tles out a bit so that the line between them joins up.
Trap mans head with disk box.
Put little man in the box and he completes the circuit.
Close down bridge then open door!
Hey presto!
:blink: