#include <TimerOne.h>

const int ledM = 3, ledH = 2, pb = 7;
 
void setup() {
  Serial.begin(9600);

  pinMode(ledM, OUTPUT);
  pinMode(ledH, OUTPUT);
  pinMode(pb, INPUT);

  //inisialisasi interrupt
  Timer1.initialize(1000000);
  Timer1.attachInterrupt(ledTask);
}

void loop() {
  //mencetak pesan ke serial monitor
  Serial.println("Universitas Indonesia, universitas kami.");
  Serial.println("Ibukota Negara, pusat ilmu budaya bangsa.");
  Serial.println("Kami mahasiswa, pengabdi cita.");
  Serial.println("Ngejar ilmu pekerti luhur.");
  Serial.println("'Tuk nusa dan bangsa.");
  Serial.println("S'mangat lincah gembira.");
  Serial.println("Sadar bertugas mulia.");
  Serial.println("Bersatu dalam karya.");
  Serial.println("Mahasiswa...");
  Serial.println("Universitas Indonesia, perlambang cita.");
  Serial.println("Berdasarkan Pancasila-dasar negara.");
  Serial.println("Kobarkan semangat kita.");
  Serial.println("Demi Ampera.");
  
  //LED merah ON setelah pesan selesai
  digitalWrite(ledM, HIGH);
  Serial.println("PESAN SELESAI");
  delay(1000);
  digitalWrite(ledM, LOW);
  delay(1000);
  
  if (digitalRead(pb) == HIGH) {
    digitalWrite(ledH, HIGH);
    Serial.println("INTERRUPT ON!");
  } else {
    digitalWrite(ledH, LOW);
  }
}

void ledTask() {
  if (digitalRead(pb) == HIGH) {
    digitalWrite(ledH, HIGH);
    Serial.println("INTERRUPT ON!");
  } else {
    digitalWrite(ledH, LOW);
  }
}