#include<reg51.h>
void main(void)
{ unsigned char a,b,m,n,t;
  void delay(void);
  while(1)
{ P1=0xfe;
  for(m=0;m<8;m++)
  {a=P1<<7;
   b=P1>>1;
   P1=a|b;
  delay();
  }
   P1=0XFD;
   delay();
  for(t=0;t<8;t++)
   {P1=(P0<<1)|0X01;
   delay();
   }
 delay();
   for(n=0;n<2;n++)
   {P1=0XFF;
   delay();
   P1=0X00;
   delay();
   }    
 }

}
void delay(void) 
{ unsigned char i,j;
for(i=0;i<200;i++)
   {for(j=0;j<255;j++)
   {}   
   }
 }