#define LDR_PIN 2
#define LED 3
#define Buzzer 7
#define LED2 6
#define LED3 5
int nilai;




void setup() {
  pinMode(LDR_PIN, INPUT);
  pinMode(LED, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(Buzzer, OUTPUT);
  pinMode(LED3, OUTPUT);
  Serial.begin(9600);

}

void loop() {
  nilai = analogRead(LDR_PIN);
  Serial.print("Nilai LDR : ");
  Serial.println(nilai);
  if (nilai < 400) {
    tone(Buzzer, 150);
    digitalWrite(LED, HIGH);
  }else{
    digitalWrite(LED, LOW);
    noTone(Buzzer);
  }
  delay(1000);

  if (nilai > 600) {
    digitalWrite(LED3, HIGH);

  }else{
    digitalWrite(LED3, LOW);
  }

  if (nilai > 400) {
    digitalWrite(LED2, HIGH);
  }else{
    digitalWrite(LED2, LOW);
  }
  if(nilai < 600){
    digitalWrite(LED2, HIGH);
  }else{
    digitalWrite(LED2, LOW);
  }


}