void setup()
{
    volatile unsigned char *dir;

    dir = (volatile unsigned char *)0x30;   
    *dir = 0xFFFF;                            
}

void loop()
{
    volatile unsigned char *out;

    out = (volatile unsigned char *)0x31; 

  *out |=0X02;
  delay(500);    
  *out |=0X08;
  delay(500);  
  *out |=0X20;
  delay(500);  
  *out |=0X80;
  delay(500);                        

    while(1);                               
}