byte ldr = A2;
byte led = 13;
int nilai;

void setup() {
  pinMode(led, OUTPUT);
    Serial.begin(9600);
    }

    void loop() {
      nilai = analogRead(ldr);
        Serial.print("Nilai LDR: ");
          Serial.println(nilai);

            if (nilai < 500) {
                digitalWrite(led, HIGH);
                  }
                    else {
                        digitalWrite(led, LOW);
                          }
                          
                          }