def setup_buttons(screen_width, screen_height):
title_button = Button(path.join(IMG_DIR, "title.png"), "title", 2)
title_button.align_center(screen_width / 2, screen_height / 2)
play_button = Button(path.join(IMG_DIR, "play_button.png"), "play")
play_button.align_left(title_button.get_left())
play_button.align_top(title_button.get_bottom())
# * unpacks tuple
about_button = Button(path.join(IMG_DIR, "about_button.png"), "about")
about_button.align_center(*title_button.get_center())
about_button.align_top(title_button.get_bottom())
quit_button = Button(path.join(IMG_DIR, "quit_button.png"), "quit")
quit_button.align_right(title_button.get_right())
quit_button.align_top(title_button.get_bottom())
button_list = pygame.sprite.Group()
button_list.add(title_button)
button_list.add(play_button)
button_list.add(about_button)
button_list.add(quit_button)
return button_list
