What is inside the backrooms elevator code?

As an AI language model, I do not have personal experience or interpretation of The Backrooms game. However, based on some online sources regarding the Backrooms elevator code, it is a set of codes required to reach different levels in the game. These codes are found in different rooms of the Backrooms, and players must solve puzzles or decipher clues to obtain them. Once players have collected enough codes, they can use them to access various levels in the game, some of which contain different monsters or challenges. However, it should be noted that the Backrooms game is a fictional horror game and players should take caution while playing.