• Block
• Piece
• Playfield

A block is a basic unit in Tetris. It is the part of a piece that fills one unit of the playfield.

A block has 2 possible statuses: empty & occupied.

Example (Empty):

◻

Example (Occupied):

▣

Also, 'Being Removed' might be another status, which shows the blocks will be removed as the row is fully occupied. Normally, they might be in a different colour or even flashing.

Example (Being Removed):

▣▣▣▣▣▣▣▣▣▣

A piece in Tetris and similar games is a geometric shape consisting of a set of blocks that are moved as a unit.

Example:

▣▣▣▣

◻▣◻◻
▣▣▣◻

▣▣
▣▣

The 2D matrix field might be in sizes of 10 x 20 or 10 x 25. In this project, 10 x 20 is the preference.

Example (10 x 20):

◻◻◻◻◻◻◻◻◻◻
◻◻◻◻◻◻◻◻◻◻
◻◻◻◻◻◻◻◻◻◻
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