Doors and rooms game walkthrough level 6-9. The music and piano room.
Pick up the fly swatter from the floor and the music sheet from the grand piano.
Use the fly swatter on the bread to make the fly sleep. In the top left is a spider on a web. Place the fly on the spider web and pick up the white roll. Dismantle the white roll to get the special key.
Use the special key on the floor trap door near the piano. You will see a puzzle with yellow lights. The puzzle solution is missing three light bulbs.
Two of the light bulbs are on the floor of the white room. One light bulb is back in the music room, hanging from the ceiling. Attach each of these bulbs to the yellow light board to light it all up.
Play the music game. Look at the music sheet you picked up from the grand piano. The notes are split into four, just like the light board. The position of the round parts of the notes are the position to put the dots on the machine. The order is: 5524, 2413, 4232 and 4143.
Press the console under the yellow lights. Set the potions to each of the above codes and zoom back out. You will then see that the lights have changed to look like a number.
The code to exit the vault in stage 6-9 of doors and room is 5749.