#include "TimerInit.h"
#define PERIOD 500    // control loop period [ms] - max 4194 ms !!!

boolean state = LOW;

void setup() 
{

  pinMode(0, OUTPUT);
  digitalWrite(0, LOW);

  TimerInit( PERIOD);
}

void loop() {
  // nothing to do
  delay(100);   // to improve simulation performance
}

// Controll loop goes here
ISR(TIMER4_COMPA_vect)
{
  state = !state;
  digitalWrite(0, state);
}