#include "hardware_dependent.h"

void setup() {
  // put your setup code here, to run once:
  init_port();

}

void loop() {
  // put your main code here, to run repeatedly:
  volatile int x;
  volatile int y;
  volatile long i;
  x=input();
  if((x&0x02)==0x02)
  {
    while(1)
    {
    y=0xFF;
    output(y);
    for (i=0;i<600000;i++);
    y=0x00;
    output(y);
    for (i=0;i<600000;i++);
    }
  }
}