Tetris Guideline - TetrisWikiRandom Generator The Random Generator (also known as "random bag" or "7 bag") determines the sequence of tetrominoes during gameplay. One of each of the 7 tetrominoes are shuffled in a "bag", and are dealt out one by one. When the bag is empty, a new one is filled and shuffled. Ghost piece The ghost piece is a player aid that allows them to preview where pieces will fall to. It is usually semi tra
