def demo(screen):
    effects = [
        Print(screen, Rainbow(screen, FigletText("256 colours")),
              y=8 - screen.height//2),
        Print(screen, Rainbow(screen, FigletText("for xterm users")),
              y=screen.height//2 + 3),
        Clock(screen, screen.width//2, screen.height//2, screen.height//2),
    ]
    screen.play([Scene(effects, -1)], stop_on_resize=True)
dataset/ETHPy150Open peterbrittain/asciimatics/samples/256colour.py/demo/swapped operands of `-`