pygame_quickstart_bouncing_ball_animation_window.py

1import sys, pygame
2pygame.init()
3
4size = width, height = 320, 240
5speed = [2, 2]
6black = 0, 0, 0
7
8screen = pygame.display.set_mode(size)
9
10ball = pygame.image.load("intro_ball.gif")
11ballrect = ball.get_rect()
12
13while True:
14    for event in pygame.event.get():
15        if event.type == pygame.QUIT: sys.exit()
16
17    ballrect = ballrect.move(speed)
18    if ballrect.left < 0 or ballrect.right > width:
19        speed[0] = -speed[0]
20    if ballrect.top < 0 or ballrect.bottom > height:
21        speed[1] = -speed[1]
22
23    screen.fill(black)
24    screen.blit(ball, ballrect)
25    pygame.display.flip()