if __name__ ='__main__' main(the usual setup code tetromino ( tetris clone by al sweigart al@inventwithpython com creative commons by-nc-sa us import randomtimepygamesys from pygame locals import fps windowwidth windowheight boxsize boardwidth boardheight blank these are the constants used by our tetromino game each box is square that is pixels wide and high the board itself is boxes wide and boxes tall the blank constant will be used as value to represent blank spaces in the board' data structure setting up timing constants for holding down keys movesidewaysfreq movedownfreq every time the player pushes the left or right arrow key downthe falling piece should move one box over to the left or rightrespectively howeverthe player can also hold down the left or right arrow key to keep moving the falling piece the movesidewaysfreq constant will set it so that every seconds that passes with the left or right arrow key held downthe piece will move another space over the movedownfreq constant is the same thing except it tells how frequently the piece drops by one box while the player has the down arrow key held down more setup code xmargin int((windowwidth boardwidth boxsize email questions to the authoral@inventwithpython com