// Definisikan pin tombol
const int buttonPin1 = 2;  // Tombol Merah
const int buttonPin2 = 3;  // Tombol Hijau
const int buttonPin3 = 4;  // Tombol Biru

// Definisikan pin LED
const int ledPin1 = 12;  // LED Merah
const int ledPin2 = 11;  // LED Hijau
const int ledPin3 = 10;  // LED Biru
const int ledPin4 = 5;   // LED Kuning

// Variabel untuk menyimpan status tombol
bool lastButton1State = HIGH; // Tombol Merah
bool lastButton2State = HIGH; // Tombol Hijau
bool lastButton3State = HIGH; // Tombol Biru

// Variabel untuk status LED
bool led1State = LOW; // Status LED1
bool led2State = LOW; // Status LED2
bool led3State = LOW; // Status LED3
bool led4State = HIGH; // LED4 awalnya menyala

void setup() {
  // Set pin tombol sebagai input dengan pull-up internal
  pinMode(buttonPin1, INPUT_PULLUP);
  pinMode(buttonPin2, INPUT_PULLUP);
  pinMode(buttonPin3, INPUT_PULLUP);

  // Set pin LED sebagai output
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  pinMode(ledPin3, OUTPUT);
  pinMode(ledPin4, OUTPUT);

  // Matikan semua LED di awal
  digitalWrite(ledPin1, LOW);
  digitalWrite(ledPin2, LOW);
  digitalWrite(ledPin3, LOW);
  digitalWrite(ledPin4, LOW);

  // Menyalakan LED sesuai urutan dengan delay 2 detik
  digitalWrite(ledPin1, HIGH);
  delay(2000); // Tunda 2 detik
  digitalWrite(ledPin1, LOW);
  
  digitalWrite(ledPin2, HIGH);
  delay(2000); // Tunda 2 detik
  digitalWrite(ledPin2, LOW);
  
  digitalWrite(ledPin3, HIGH);
  delay(2000); // Tunda 2 detik
  digitalWrite(ledPin3, LOW);
  
  digitalWrite(ledPin4, HIGH);
  delay(2000); // Tunda 2 detik
  digitalWrite(ledPin4, LOW);
}

void loop() {
  // Baca status tombol
  bool button1State = digitalRead(buttonPin1);
  bool button2State = digitalRead(buttonPin2);
  bool button3State = digitalRead(buttonPin3);

  // Toggle LED1 jika Button 1 ditekan dan dilepas
  if (button1State == LOW && lastButton1State == HIGH) {
    led1State = !led1State;
    digitalWrite(ledPin1, led1State);
    delay(50); // Debounce delay
  }
  lastButton1State = button1State;

  // Toggle LED2 jika Button 2 ditekan dan dilepas
  if (button2State == LOW && lastButton2State == HIGH) {
    led2State = !led2State;
    digitalWrite(ledPin2, led2State);
    delay(50); // Debounce delay
  }
  lastButton2State = button2State;

  // Toggle LED3 dan LED4 jika Button 3 ditekan dan dilepas
  if (button3State == LOW && lastButton3State == HIGH) {
    led3State = !led3State;
    led4State = led3State; // Ikuti status LED3
    digitalWrite(ledPin3, led3State);
    digitalWrite(ledPin4, led4State);
    delay(50); // Debounce delay
  }
  lastButton3State = button3State;
}