long int Hitung = 0;
int LED = 13;
int n;

void setup() {
  // put your setup code here, to run once:
  pinMode(LED, OUTPUT);
  digitalWrite(LED, LOW);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(LED, HIGH);
  delay (500);
  digitalWrite(LED, LOW);
  delay (500);
  attachInterrupt(digitalPinToInterrupt(2), Menghitung, RISING);
  Serial.print("Logika Interrrupt: ");
  Serial.print(digitalRead(2));
  Serial.print("      Output = ");
  Serial.println(Hitung);
}

void Menghitung () {  
  Hitung = Hitung+1;
}