Here, you need to look closely between the cushions of the couch on the left to find a battery. Now go to the table and look underneath it. You will find a TV remote here. Put the battery in the remote and turn on the TV. 4 colored horizontal lines will appear on its screen. The colors, from top to bottom, will be as follows:
Blue
Yellow
White
Red
Now look under the couch on the right to find a coin. Pick it up and go to the coin slot of the vending machine. Put the coin in the slot to reveal 4 horizontal white bars. Change their color according to the color combination displayed on the TV. As you do this, a bottle will come out of the vending machine. Pick up the bottle and look on top of the vending machine. There is a corkscrew lying here. Pick it up and use it to uncork the bottle. There is piece of paper folded inside the bottle with the numbers 3945 written on it. Now press the elevator button and enter the 4-digit code you just obtained. This will open the elevator doors, allowing you to escape this floor.
