#define DELAY 300000
void setup() {
  volatile long *dir=0x21;
  *dir=0xff;

}

void loop() {
  // put your main code here, to run repeatedly:
  volatile long *out_data=0x22;
  volatile long i;
  *out_data=164;
  for(i=0;i<DELAY;i++);

  *out_data=176;
  for(i=0;i<DELAY;i++);

  *out_data=146;
  for(i=0;i<DELAY;i++);

  *out_data=248;
  for(i=0;i<DELAY;i++);

}