main-window.py

import os
import pygame as pg

if not pg.font:
    print("Warning, fonts disabled")
if not pg.mixer:
    print("Warning, sound disabled")

main_dir = os.path.split(os.path.abspath(__file__))[0]
data_dir = os.path.join(main_dir, "data")

def load_image(name, colorkey=None, scale=1):
    fullname = os.path.join(data_dir, name)
    image = pg.image.load(fullname)

    size = image.get_size()
    size = (size[0] * scale, size[1] * scale)
    image = pg.transform.scale(image, size)

    image = image.convert()
    if colorkey is not None:
        if colorkey == -1:
            colorkey = image.get_at((0, 0))
        image.set_colorkey(colorkey, pg.RLEACCEL)
    return image, image.get_rect()

class CountingObjects(pg.sprite.Sprite):
    """moves the objects to be counted around the screen"""

    def __init__(self):
        pg.sprite.Sprite.__init__(self)  # call Sprite initializer
        self.image, self.rect = load_image("diamond.png", -1, 4)
        screen = pg.display.get_surface()
        self.area = screen.get_rect()
        self.rect.topleft = 10, 90
        self.move = 18

    def _walk(self):
        """move the object across the screen, and turn at the ends"""
        newpos = self.rect.move((self.move, 0))
        if not self.area.contains(newpos):
            if self.rect.left < self.area.left or self.rect.right > self.area.right:
                self.move = -self.move
                newpos = self.rect.move((self.move, 0))
                self.image = pg.transform.flip(self.image, True, False)
        self.rect = newpos

# pygame setup
pg.init()
screen = pg.display.set_mode((1000, 1000), pg.SCALED)
pg.display.set_caption("Counting Simulator")
clock = pg.time.Clock()
running = True

background = pg.Surface(screen.get_size())
background = background.convert()
background.fill((102, 204, 10))

if pg.font:
    font = pg.font.Font(None, 64)
    text = font.render("How many sheep are there?", True, (10, 10, 10))
    textpos = text.get_rect(centerx=background.get_width() / 2, y=background.get_height() - 100)
    background.blit(text, textpos)

while running:
    # poll for events
    # pg.QUIT event means the user clicked X to close your window
    for event in pg.event.get():
        if event.type == pg.QUIT:
            running = False

    screen.blit(background, (0, 0))

    # RENDER YOUR GAME HERE

    # flip() the display to put your work on screen
    pg.display.flip()

    clock.tick(60)  # limits FPS to 60

pg.quit()