#include

#define uint unsigned int

#define uchar unsigned char

void delay(uint z)

{

uchar i;

while(z--)

for(i=120;i>0;i--);

}

void main()

{

while(1)

{

P2=0X08;

delay(100);

P2=0X04;

delay(100);

P2=0X02;

delay(100);

P2=0X01;

delay(100);

}

}