说明：  本课题设计一个汽车尾灯的控制电路。 汽车尾部左右两侧各有3个指示灯。当接通左转、右转或时，指示灯按照指定要求闪烁。
(This topic to design a car taillights of control circuit. Automobile tail about three lights on each side. When connected to turn left, turn right, or when the indicator light flashing in accordance with specified requirements.)