#include <Servo.h>

#define echoPin 2
#define trigPin 3
#define red 10
#define green 9
#define buzzer 1
#define servoPin 5 // Ganti dengan pin yang ingin Anda gunakan untuk menghubungkan servo

long duration, distance;
Servo myservo; // Membuat objek Servo

void setup() {
  Serial.begin(9600);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(red, OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(buzzer, OUTPUT);
  myservo.attach(5); // Menghubungkan servo ke pin yang Anda tentukan
}

void loop() {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  duration = pulseIn(echoPin, HIGH);
  distance = (duration / 2) / 58.0;

  if (distance <= 100) {
    digitalWrite(red, HIGH);
    digitalWrite(green, LOW);
    playMelody(); // Panggil fungsi untuk memainkan melodi
    myservo.write(90);
  } else {
    digitalWrite(red, LOW);
    digitalWrite(green, HIGH);
    noTone(buzzer);
    myservo.write(0); // Menggerakkan servo kembali ke posisi 0 derajat (atau sesuai dengan kebutuhan Anda)
  }

  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");
  delay(100);
}

void playMelody() {
  int melody[] = {
    262, 196, 196, 220, 196, 0, 247,
    262, 196, 196, 220, 196, 0, 294,
    262, 349, 330, 294, 247, 220, 196, 330, 349
  };
  int noteDuration[] = {
    4, 8, 8, 4, 4, 4, 4,
    4, 8, 8, 4, 4, 4, 4,
    4, 4, 4, 4, 4, 4, 4, 4, 2
  };

  for (int i = 0; i < sizeof(melody) / sizeof(melody[0]); i++) {
    int noteDurationMS = 1000 / noteDuration[i];
    tone(buzzer, melody[i], noteDurationMS);
    delay(noteDurationMS + 50); // Menambah sedikit delay antara nada
  }
  noTone(buzzer);
}