#include <reg52.H>

unsigned char code tab[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};

unsigned char code graph[]={0x30,0x48,0x44,0x22,0x44,0x48,0x30,0x00};

unsigned char cnta;

void main(void)

{

unsigned int i,j;

 TMOD=0x01;

 TH0=(65536-2000)/256;

 TL0=(65536-2000)%256;

 TR0=1;

 ET0=1;

 EA=1;

while(1)

   {

   }

}

void t0(void) interrupt 1 using 0

{

TH0=(65536-2000)/256;

TL0=(65536-2000)%256;

P1=tab[cnta];

P0=graph[cnta];

cnta++;

if(cnta==8)

  {

   cnta=0;

  }

}