8.33: Drawing Everything to the Screen

def drawBoard(board):
    # draw the border around the board
    pygame.draw.rect(DISPLAYSURF, BORDERCOLOR, (XMARGIN - 3, TOPMARGIN - 7, (BOARDWIDTH * BOXSIZE) + 8, (BOARDHEIGHT * BOXSIZE) + 8), 5)

    # fill the background of the board
    pygame.draw.rect(DISPLAYSURF, BGCOLOR, (XMARGIN, TOPMARGIN, BOXSIZE * BOARDWIDTH, BOXSIZE * BOARDHEIGHT))
    # draw the individual boxes on the board
    for x in range(BOARDWIDTH):
        for y in range(BOARDHEIGHT):
            drawBox(x, y, board[x][y])

The drawBoard() function is responsible for calling the drawing functions for the board’s border and all the boxes on the board. First the board’s border is drawn on DISPLAYSURF, followed by the background color of the board. Then a call to drawBox() is made for each space on the board. The drawBox() function is smart enough to leave out the box if board[x][y] is set to BLANK.