//Seven segment display,Common cathode number 0~9

unsigned char _pac @ 0x13;

unsigned char _pa  @ 0x12;



#define _pa7   _12_7

const unsigned char pattern[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};

void delay(){unsigned long i;  for(i=0;i<5000;i++);}

void main()

{ 

  while(1)

  {

   unsigned int j;

   _pac = 0x00;

   j=0;

   while(1)

   { _pa = pattern[j];  

     delay(); 

     j++;

     if(j>=10)j=0;

   }

 }

}