int Led = 13;
int Ldr = A0;
int Buzzer = 12;
int Nilai;

void setup() {
  pinMode(Led, OUTPUT);
  pinMode(Buzzer, OUTPUT);
  pinMode(Ldr, INPUT);
  Serial.begin(9600);
}

void loop() {
  Nilai = analogRead(Ldr);
  Serial.print("Nilai Cahaya : ");
  Serial.println(Nilai);

  if(Nilai > 100) {
    digitalWrite(Led, HIGH);
    noTone(Buzzer);
  }
  else {
    digitalWrite(Led, LOW);
    tone(Buzzer, 1000);
  }
}