3 ms·All I see are a bunch of tetris, two upside down deltas and a tank. (BTW, what's the plural of tetris?)by po 16y agoAll I see are a bunch of tetris, two upside down deltas and a tank. (BTW, what's the plural of tetris?)sp332 16y agoThey're called tetrominoes, singular tetromino. http://en.wikipedia.org/wiki/Tetromino http://en.wikipedia.org/wiki/Tetrominopo 16y agoI love hacker news.