Instructions
Locate the post on the ground near the entrance to the room. Pick it up and walk over to the first set of light beams. Hold the post over the beam on the right side.
Continue down the path to the second set of beams. Wait for the spikes to retreat into the floor, then hold the post over the left light beam.
Advance across the room to the third set of light beams. When the spikes retract, hold the post over the beam on the right. The door will open and you can exit.