import pygame

### initialization

width = 640
height = 480
screen = pygame.display.set_mode((width,height))


### the game loop

keepGoing = True

while (keepGoing):

    # deal with events
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            keepGoing = False

    # background color
    screen.fill(pygame.color.Color("darkblue"))

    # draw a circle
    pygame.draw.circle(screen,pygame.color.Color("orange"),(100,100), (50))

    # update display
    pygame.display.update()


### quit

pygame.quit()