def run(scen_list):
    pygame.init()
    pygame.font.init()

    DISPLAY_WIDTH = 320
    DISPLAY_HEIGHT = 240
    screen = pygame.display.set_mode((DISPLAY_WIDTH, DISPLAY_HEIGHT))
    pygame.event.set_allowed([pygame.MOUSEMOTION, pygame.MOUSEBUTTONUP, pygame.QUIT, pygame.KEYDOWN])

    scsel = ScenarioSelectScreen(screen)
    scsel.set_scenarios(scen_list.scenarios)

    mouse_pos = None # Absolute position of the mouse, or L{None} if unknown.
    while True:
        scsel.draw(mouse_pos)
        pygame.display.flip()

        while True:
            # Only events that are allowed get here!
            # See pygame.event.set_allowed.
            event = pygame.event.wait()
            if event.type == pygame.MOUSEMOTION:
                mouse_pos = event.pos
                break

            if event.type == pygame.MOUSEBUTTONUP:
                print event.pos, event.button

            if event.type == pygame.QUIT:
                return
            if event.type == pygame.KEYDOWN and event.key == ord('q'):
                return