def green_light():
trafficlight = Traffic()
trafficlight.setStand(0)
trafficlight.update_light()
return 'Hello, World!'
def red_light():
trafficlight = Traffic()
trafficlight.setStand(3)
trafficlight.update_light()
return 'Hello, World!'
def amber_light():
trafficlight = Traffic()
trafficlight.setStand(1)
trafficlight.update_light()
return 'Hello, World!'
