用定时/计数器T1产生定时时钟，由P1口控制8个发光二极管，使8个指示灯依次一个一个闪动，

//闪动频率为半秒钟1次-With timer/counter T1 timer clock generated by the P1 port control of eight light-emitting diodes, so that eight lights in turn one by one flashing,

// The flashing frequency is once every half second