#define LED_COUNT 4
#define merah 2
#define kuning 3
#define ijo 4
#define biru 5

#define BUZZER_COUNT 2
#define buzz1 6
#define buzz2 7

// Define the pins for the LEDs
const int LED_pins[LED_COUNT] = {merah, kuning, ijo, biru};
// Define the pins for the buzzers
const int buzz_pins[BUZZER_COUNT] = {buzz1, buzz2};

void setup() {
  // Set the LED pins as outputs
  for (int i = 0; i < LED_COUNT; i++) {
    pinMode(LED_pins[i], OUTPUT);
  }
  // Set the buzzer pins as outputs
  for (int i = 0; i < BUZZER_COUNT; i++) {
    pinMode(buzz_pins[i], OUTPUT);
  }
}

void beep1() {
  tone(buzz_pins[0], 500);
  delay(200);
  noTone(buzz_pins[0]);
}

void beep2() {
  tone(buzz_pins[1], 500);
  delay(200);
  noTone(buzz_pins[1]);
}

void loop() {
  // Sequential LED blinking
  for (int i = 0; i < LED_COUNT; i++) {
    digitalWrite(LED_pins[i], HIGH);
    delay(200);
    digitalWrite(LED_pins[i], LOW);
    delay(200);
  }

  // Alternating LED pairs with buzzer 1
  digitalWrite(LED_pins[0], HIGH); // LED_merah
  digitalWrite(LED_pins[2], HIGH); // LED_ijo
  beep1();
  delay(200);
  digitalWrite(LED_pins[0], LOW);
  digitalWrite(LED_pins[2], LOW);
  delay(200);

  digitalWrite(LED_pins[1], HIGH); // LED_kuning
  digitalWrite(LED_pins[3], HIGH); // LED_biru
  beep1();
  delay(200);
  digitalWrite(LED_pins[1], LOW);
  digitalWrite(LED_pins[3], LOW);
  delay(200);

  // Alternating LED pairs with buzzer 2
  digitalWrite(LED_pins[0], HIGH); // LED_merah
  digitalWrite(LED_pins[2], HIGH); // LED_ijo
  beep2();
  delay(200);
  digitalWrite(LED_pins[0], LOW);
  digitalWrite(LED_pins[2], LOW);
  delay(200);

  digitalWrite(LED_pins[1], HIGH); // LED_kuning
  digitalWrite(LED_pins[3], HIGH); // LED_biru
  beep2();
  delay(200);
  digitalWrite(LED_pins[1], LOW);
  digitalWrite(LED_pins[3], LOW);
  delay(200);
}