How to pass the infrared ray of Luigi 15 building?

When you come to the social room in the attic of 15, the plot is triggered. First, open the room with a toilet plug on the right side of the screen and let the doppelganger in to open the door. After going in, you need to find four keys. Each key is placed in one room, and the four rooms are secret doors, which need to be opened by dim light.

The first room needs to avoid the laser. Jump the powder on the floor with ZL+ZR and you can see the laser. Go downstairs, turn off the laser light and get the key to the gem.

In the second room, blow the fan on the left, operate the switch mechanism, and then pick up the jade key.

The third room is the bathroom, so you have to pull the switch. Go to the bathtub, turn on the tap by blowing, and get the sapphire key.

The fourth room is the studio. Go to the right and turn on the mechanism, and the floor will become a balance. Go up and shut down the machine and get the sapphire key. After finding four keys, insert them into the keyhole and enter the boss's room. Playing boss requires controlling two characters at the same time, using two body double to turn off the switch, and then Luigi is on it. When boss attacks and gets stuck on the ground, the light flashes and falls, and it can pass four times.