#include<at89x52.h>

#define uchar unsigned char
#define uint  unsigned int

void delay(uint a);

void main()
{
  uint a,b;
  while(1)
  {
   b=0x80;
   for(a=0;a<8;a++)
   {
     P0=b;
	 delay(30000);
	 b=b>>1;
   }
  }
}
  

void delay(uint a)
{
  uint b;
  for(b=0;b<a;b++);
}