#!/usr/bin/env python
# -*- coding: utf-8 -*-

import pygame
import pygame.locals as pg


def initialize_screen():
    """Initialize pygame, create a window and fill it with gray.
    Return the screen surface.
    """
    screen = None
    return screen

def load_and_display_image(screen):
    """Load the image and display it in the middle of the screen."""

def wait_for_quit():
    """Sit there doing nothing until the window is closed."""


if __name__ == '__main__':
    screen = initialize_screen()
    load_and_display_image(screen)
    wait_for_quit()