import pygame


def initialize():
    """
    This function sets some global constants.
    """
    pygame.init()

    # set up the display window
    global width, height, screen
    width = 800
    height = 800
    screen = pygame.display.set_mode((width,height))


def run_game():

    # initialize the balloon's position and speed
    b_x = 100
    b_y = 100
    b_speed_x = 0.2
    b_speed_y = 0.2

    # initialize the score
    score = 0

    # start clock
    clock = pygame.time.Clock()
    
    keepGoing = True

    while (keepGoing):

        dt = clock.tick()

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                keepGoing = False

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

        # calculate the new position and speed of the balloon
        pygame.draw.circle(screen,pygame.color.Color("orange"),(width/2,height/2),(height-10)/2)

        # update display
        pygame.display.update()


def quit():
    
    pygame.quit()
    


def main():

    initialize()

    run_game()

    quit()



main()