Tetromino
A tetromino is a geometric shape composed of four squares, connected orthogonally (i.e. at the edges and not the corners).
A tetromino is a geometric shape composed of four squares, connected orthogonally (i.e. at the edges and not the corners).
A tetromino is a geometric shape composed of four squares, connected orthogonally (i.e. at the edges and not the corners).
Source: Wikipedia "Tetromino" · CC BY-SA 4.0
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