Tetromino
A tetromino, sometimes called tetramino or tetrimino, is a four-squared polyomino. The seven tetrominoes are I, O, T, S, Z, J, and L.
I
Other names include straight, stick, and long. This is the only tetromino that can make a "tetris" (four lines with one tetromino) outside of cascade games.
   |
O
Other names include square and block.
 |
T
|
S
Other names include inverse skew.
|
Z
Other names include skew.
|
J
Other names include gamma or inverse L.
|
L
|
