#include <reg51.h>
void delay(void)
{
  unsigned int i;
   for(i=0;i<32767;i++)
   	i=i;
}
	
void main(void)
{
 unsigned int j; 
 while(1)
  {
    for(j=0x01;j<=0x80;j<<=1)
    {
	P0=j;
        delay();
	  
    }
  }
}