import pygame

class checkers:
  def __init__ ( self, screen ):
   self.board = list()
   self.blackCheckers = list()
   self.redCheckers = list()
   self.clearList = list()
   self.refreshList = list()

   blackRow = list()
   redRow = list()

   self.screen = screen

   for i in range ( 4 ):
     blackRow.append ( ( 128, 0, 0 ) )
     blackRow.append ( ( 10, 10, 10 ) )

     redRow.append ( ( 10, 10, 10 ) )
     redRow.append ( ( 128, 0, 0 ) )

   for i in range ( 4 ):
     self.board.append ( blackRow )
     self.board.append ( redRow )

  def drawBoard ( self ):
   x = 0
   y = 0

   for row in self.board:
     for square in row:
      pygame.draw.rect ( self.screen, square, 
* 50, y * 50, 50, 50 ), 0 )
     x += 1
     x = 0
     y += 1

   pygame.display.flip()

  def drawCheckers ( self ):
   for address in self.blackCheckers:
     refreshRect = pygame.draw.circle ( self.screen, 
 0, 0 ), ( address [ 0 ] * 50 + 25, address [ 1 ] * 50 + 25 ), 20, 0 )
     self.refreshList.append ( refreshRect )
   for address in self.redCheckers:
     refreshRect = pygame.draw.circle ( self.screen, 
0, 0, 0 ), ( address [ 0 ] * 50 + 25, address [ 1 ] * 50 + 25 ), 20, 0 )
     self.refreshList.append ( refreshRect )

  def clearSpace ( self ):
   for address in self.clearList:
     refreshRect = pygame.draw.rect ( 
.screen, self.board [ address [ 0 ] ] 
dress [ 1 ] ], ( address [ 0 ] * 50, address [ 1 ] * 50, 50, 50 ), 0 )
     self.refreshList.append ( refreshRect )

  def update ( self ):
   self.clearSpace()
   self.drawCheckers()
   pygame.display.update ( self.refreshList )
   self.refreshList = list()

pygame.display.init()
screen = pygame.display.set_mode ( ( 640, 480 ) )

game = checkers ( screen )

game.drawBoard()
game.redCheckers.append ( ( 3, 0 ) )
game.blackCheckers.append ( ( 4, 2 ) )
game.clearList.append ( ( 3, 0 ) )
game.clearList.append ( ( 5, 0 ) )
game.update()

raw_input()
pygame.quit()