byte ldr = A0;
byte led1 = 13;
byte led2 = 12;
int nilai;

void setup() {
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  nilai = analogRead(ldr);
  Serial.print("Nilai LDR: ");
  Serial.println(nilai);
  
  if(nilai < 500) {
    digitalWrite(led1, HIGH);
    digitalWrite(led2, LOW);
  }
  if(nilai >= 500) {
    digitalWrite(led1, LOW);
    digitalWrite(led2, HIGH);
  }
  else {
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
  }

}