交通灯控制实验（南北路口的绿灯、东西路口的红灯同时亮3秒左右；

南北路口的黄灯闪烁若干次，同时东西路口的红灯继续亮；

南北路口的红灯、东西路口的绿灯同时亮3秒左右；

南北路口的红灯继续亮，同时东西路口的黄灯闪烁若干次；

）和可编程定时器/计数器-Traffic light control experiment (green, red stuff intersection north and south at the same intersection about 3 seconds bright

Several north-south crossing flashing yellow light, red light intersection while things continue to light

North-south crossing a red light, green light intersection at the same time something bright about 3 seconds

Continue north and south intersection red light, yellow light flashes while crossing a number of things

) And a programmable timer/counter