const int tombolA = 5;    
const int tombolB = 4;
const int tombolC = 3;
const int tombolD = 2;
const int lampuA = A0;
const int lampuB = A1;
const int lampuC = A2;
const int lampuD = A3;
const int buzzer = 9; 
const int Reset = 8;

bool kunci = false;

void setup()
{
  Serial.begin(9600);
  Serial.println(F("Rangkaian Bel cerdas cermat berbasis arduino"));
  Serial.println();

  pinMode(tombolA, INPUT_PULLUP);  
  pinMode(tombolB, INPUT_PULLUP);
  pinMode(tombolC, INPUT_PULLUP);
  pinMode(tombolD, INPUT_PULLUP);
  pinMode(lampuA, OUTPUT);
  pinMode(lampuB, OUTPUT);
  pinMode(lampuC, OUTPUT);
  pinMode(lampuD, OUTPUT);
  pinMode(buzzer, OUTPUT);
  pinMode(Reset, INPUT_PULLUP);
}
void loop()
{
  if(kunci == false){               
    if(digitalRead (tombolA) == LOW){  
      digitalWrite(lampuA, HIGH);
      Serial.print("REGU A MENEKAN TOMBOL");
      Serial.println();
      tone(9, 1000);      
      kunci = true;               
    }
    else if(digitalRead (tombolB) == LOW){
      digitalWrite(lampuB, HIGH);
      Serial.print("REGU B MENEKAN TOMBOL");
      Serial.println();
      tone(9, 1000);
      kunci = true;
    }
    else if(digitalRead (tombolC) == LOW){
      digitalWrite(lampuC, HIGH);
      Serial.print("REGU C MENEKAN TOMBOL");
      Serial.println();
      tone(9, 1000);
      kunci = true;
    }
    else if(digitalRead (tombolD) == LOW){
      digitalWrite(lampuD, HIGH);
      Serial.print("REGU D MENEKAN TOMBOL");
      Serial.println();
      tone(9, 1000);
      kunci = true;
    }
  }
  else {                  
    if(digitalRead (Reset) == LOW){
      kunci = false;    
      digitalWrite(lampuA, LOW);
      digitalWrite(lampuB, LOW);
      digitalWrite(lampuC, LOW);
      digitalWrite(lampuD, LOW);
      Serial.println("Reset");
      Serial.println("Sesi mulai");
      noTone(9);   
      delay(100);
    }
  }
}