#include<reg52.h>
#define uchar unsigned char
#define LED P1
uchar code disbuf[9]={0xff,0x7f,0x3f,0x1f,0x0f,0x07,0x03,0x01,0x00};

void delayms(uchar ms)
{
 uchar i;
 while(ms--)
 for(i=123;i>0;i--);
}


main()
{
 uchar j;
 LED=0xff;
 while(1)
 {
   for(j=1;j<9;j++)
   {
   LED=disbuf[j];
   delayms(250);delayms(250);delayms(250);delayms(250);
   }

   for(j=8;j>0;j--)
   {
   LED=disbuf[j-1];
   delayms(250);delayms(250);delayms(250);delayms(250);
   }
   
   for(j=8;j>0;j--)
   {
    LED=~LED;
    delayms(250);delayms(250);
   }
 }
}

 

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