What are the GraalOnline Classic background codes?

GraalOnline Classic background codes are special commands that can be used to change the background of a player's avatar or the game screen by altering the URL of the image. These codes allow players to customize their in-game experience by adding unique backgrounds to their characters or the game environment. However, it's important to note that the use of background codes may be subject to the game's terms of service and rules.