import pygame, random

# how many horizontal cells?
NUM_CELLS=64

# open the graphics window 
screen = pygame.display.set_mode((640, 480)) 

for x in range(0, NUM_CELLS):
	if random.randrange(2) == 1:	# if coin-flip gives a 1, set color to green
		color = (0, 255, 0)
	else:                           # otherwise to black
		color = (0, 0, 0)

	# draw a 9x9 pixel rectable, with the top left corner at (x*10,0)
	# (notice, unlike turtle graphics, (0, 0) is the *top left* of the window
	pygame.draw.rect(screen, color, (x*10, 0, 9, 9))


# actually show the graphics we've been plotting
pygame.display.flip()   

raw_input("--- Press enter to quit ---")

# close the window
pygame.display.quit()