Escape fan closed doors

In the hallway is a three rooms. All of them are closed and you need to get them. After all, only after passing all the rooms, you will be able to get out of this place. Try to find at the outset purple key and open the purple door. Behind it you will find a small device that you will need in the next step. Plus, there's always the chance that you will find there is a new key to the room.