def runGame(): # setup variables for the start of the game board = getBlankBoard() lastMoveDownTime = time.time() lastMoveSidewaysTime = time.time() lastFallTime = time.time() movingDown = False # note: there is no movingUp variable movingLeft = False movingRight = False score = 0 level, fallFreq = calculateLevelAndFallFreq(score) fallingPiece = getNewPiece() nextPiece = getNewPiece()
Before the game begins and pieces start falling, we need to initialize some variables to their start- of-game values. On line 13  the
fallingPiece variable will be set to the currently falling piece that can be rotated by the player. On line 14  the
nextPiece variable will be set to the piece that shows up in the "Next" part of the screen so that player knows what piece is coming up after setting the falling piece.