Playing with some basic pygame: a simple full-screen bouncing box.

bounce.py

#/usr/bin/env python

import pygame
from pygame.locals import *


BOX_WIDTH = 100
BOX_HEIGHT = 100

BLACK = (0, 0, 0)
WHITE = (255, 255, 255)


def main():
    pygame.init()

    x, y = BOX_WIDTH, BOX_HEIGHT
    dx, dy = 1, 1

    s = pygame.display.set_mode((0, 0),
                                pygame.FULLSCREEN |
                                pygame.HWSURFACE |
                                pygame.DOUBLEBUF)
    width, height = s.get_size()

    clock = pygame.time.Clock()

    pygame.event.set_allowed(None)
    pygame.event.set_allowed((QUIT, KEYDOWN))

    running = True
    while running:
        pygame.display.flip()
        clock.tick(60)

        for event in pygame.event.get():
            if event.type == QUIT:
                running = False
            if event.type == KEYDOWN and event.key == K_ESCAPE:
                running = False

        x += dx
        if x > width or x < BOX_WIDTH / 2:
            dx = -dx
        y += dy
        if y > height or y < BOX_HEIGHT / 2:
            dy = -dy

        s.fill(BLACK)
        s.fill(WHITE,
               (x - BOX_WIDTH / 2,
                y - BOX_HEIGHT / 2,
                BOX_WIDTH / 2,
                BOX_HEIGHT / 2))

    pygame.display.quit()


if __name__ == '__main__':
    main()