gistfile1.txt

import pygame, sys

WHITE = (255, 255, 255, 0)
BLUE = (255, 0, 0, 0)

# set up pygame
pygame.init()

# set up the window
windowSurface = pygame.display.set_mode((500, 400))
pygame.display.set_caption('Hello world!')

y = 100
x = 300

# run the game loop
while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_UP:
                y -= 5

    # draw the white background onto the surface
    windowSurface.fill(WHITE)

    # draw a blue circle onto the surface
    pygame.draw.circle(windowSurface, BLUE, (x, y), 20, 0)

    # draw the window onto the screen
    pygame.display.update()
    pygame.display.flip()

    # wait a little bit
    pygame.time.delay(16)