Tetris Guideline
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The Tetris guideline is the current specification The Tetris Company enforces for making all new Tetris games alike in form.
Current rules include:
- 22x10 cell playing field
- Tetromino colors
- Cyan I
- Yellow O
- Purple T
- Green S
- Red Z
- Blue J
- Orange L
- Tetromino spawn locations
- The I and O spawn in the middle columns
- The rest spawn in the left-middle columns
- The tetrominoes spawn horizontally and right-side up.