The official Tetris rules state that you get one of each type in groups of seven; aka bags[1]. In other words, you get a maximum of two of a type in a row.<p>[1] <a href="http:&#x2F;&#x2F;tetris.wikia.com&#x2F;wiki&#x2F;Random_Generator" rel="nofollow">http:&#x2F;&#x2F;tetris.wikia.com&#x2F;wiki&#x2F;Random_Generator</a>