7-TrafficLights-solution.py 文件源码

def flashingambergreen():
    print("Flashing amber and green")
    red.off()
    green.off()

    iCount = 1
    while iCount <= 6:
        yellow.on()
        time.sleep(0.5)
        yellow.off()
        time.sleep(0.5)
        iCount += 1
    green.on()


# Flash the amber for one more second
# (Turn the green 'pedestrian' LED off and the red on)