""" idea.py
    simplest possible pygame display
    demonstrates IDEA / ALTER model
    Andy Harris, 5/06
    """

#I - Import and initialize
import pygame
pygame.init()

#D - Display configuration
screen = pygame.display.set_mode((640, 480))
pygame.display.set_caption("Hello, world!")

#E - Entities (just background for now)
background = pygame.Surface(screen.get_size())
background = background.convert()
background.fill((0, 0, 255))

#A - Action (broken into ALTER steps)

    #A - Assign values to key variables
clock = pygame.time.Clock()
keepGoing = True

    #L - Set up main loop
while keepGoing:

    #T - Timer to set frame rate
    clock.tick(30)

    #E - Event handling
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            keepGoing = False

    #R - Refresh display
    screen.blit(background, (0, 0))
    pygame.display.flip()