- bullet = pygame.Surface([3, 3])
- bullet.fill([255, 0, 0])
- filename = argv[0]
+ red = pygame.Surface([3, 3])
+ red.fill([255, 0, 0])
+ green = pygame.Surface([3, 3])
+ green.fill([0, 255, 0])
+ blue = pygame.Surface([3, 3])
+ blue.fill([0, 0, 255])