#include<reg52.h>
#include<intrins.h>
#define uint unsigned int
#define uchar unsigned char
uchar temp;
void delay (uint);
void main( )
{
temp=0xfe;
p1=temp;
while(1)
{
temp=0xfe;
p1=temp;
temp=_crol_(temp,1);
delay(600);
p1=temp;
delay(600);
}
}
void dealy (uint z)
{
uint x,y;
for (x=100;x>0;x--)
for(y=z;y>0;y--);
}