Tetris Guideline

Modern standardization is the current specification The Tetris Company enforces for making all new Tetris games alike in form.

Current modern 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