long start, stop = 0;
volatile long Timer2_overflow_counter = 0;
long duration = 0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);

  TCCR2B = (1 << CS21);
  TIMSK2 = (1 << TOIE2);

}

void loop() {
  /*
  start = micros();
  // put your main code here, to run repeatedly:
  //Serial.println(runtime);
  delayMicroseconds(2000);
  stop = micros();

  duration = (stop - start);
  Serial.println(duration);
  */
/*
  Serial.print(micros());
  Serial.print("  ");
  Serial.println(runtime());
*/



    delay(1000);
}

ISR(TIMER2_OVF_vect){
  Timer2_overflow_counter++;
  //Serial.println(Timer0_overflow_counter);
}

long runtime(void){
  uint8_t timer2_value = TCNT2;
  long duration = (Timer2_overflow_counter * 32768 ) + (timer2_value * 64);
  return duration;
}