#include<reg52.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
uchar temp;
void delay(uint z)
{
	uint x,y;
	for(x=z;x>0;x--)
		for(y=110;y>0;y--);
}
void main()
{
	temp=0x01;
	P0=temp;
	while(1)
	{
		temp=_cror_(temp,1);
	    delay(500);
		P0=temp;
	 }
}