#include<reg51.h>
void delay()
{
 unsigned int i,j,k;
 for(i=5;i>0;i--)
 for(j=20;j>0;j--)
 for(k=250;k>0;k--);
 }
 void main(void)
 {  int j,b,t,w,m,n[10]={0XFF,0XFE,0XFD,0XFB,0XF7,0XEF,0XDF,0XBF,0X7F,0XFF};
    while(1)
  {
   P0=0XFE;
  	delay();
    for(j=0;j<8;j++)
	{P0=(P0<<1)+1;
	delay();}  
	  P0=0X7F;
  	delay();
    for(j=0;j<8;j++)
	{P0=(P0>>1)+0x80;
	delay();}
 for(b=0;b<3;b++)
  { P0=0XFC;
	delay();
	for(j=0;j<8;j++)
	{P0=(P0<<2)+3;
     delay();}
   }
 	P0=0X3F;
	delay();
	for(j=0;j<8;j++)
	{P0=(P0>>2)+0XC0;
	delay();}
 for(t=0;t<2;t++)
{
  P0=0XF0;
    delay();
    for(j=0;j<8;j++)
    {P0=(P0<<4)+0X0F;
     delay();}
}
  
 
for(m=0;m<10;m++)
    {P0=n[m];
     delay();}
   for(m=0;m<10;m++)
    {P1=n[m];
     delay();}
   for(m=0;m<10;m++)
    {P2=n[m];
     delay();}
    for(m=0;m<10;m++)
    {P3=n[m];
     delay();}
 for(m=9;m>=0;m--)
   {P3=n[m];
   delay();}
for(m=9;m>=0;m--)
   {P2=n[m];
   delay();}
for(m=9;m>=0;m--)
   {P1=n[m];
   delay();}
for(m=9;m>=0;m--)
   {P0=n[m];
   delay();}
P0=P1=P2=P3=0XFE;
delay();
for(w=0;w<8;w++)
  {P0=P1=P2=P3=(P0=P1=P2=P3<<1)+1;
delay();}
P0=P1=P2=P3=0X7F;
delay();
for(w=0;w<8;w++)
 {P0=P1=P2=P3=(P0=P1=P2=P3>>1)+0X80;
delay();}
P0=0X00;delay();P0=0XFF;
P1=0X00;delay();P1=0XFF;
P2=0X00;delay();P2=0XFF;
P3=0X00;delay();P3=0XFF;
delay();
P3=0X00;delay();P3=0XFF;
P2=0X00;delay();P2=0XFF;
P1=0X00;delay();P1=0XFF;
P0=0X00;delay();P0=0XFF;
P0=P1=P2=P3=0X00;
delay();
delay();
delay();
P0=P1=P2=P3=0XFF;
delay();
delay();
 }
}