void setup() {
  pinMode(led, OUTPUT);
  Serial.begin(9600);
  // put your setup code here, to run once:

}

void loop() {
  int value = analogRead(ldr);

  Serial.print("LDR: ");
  Serial.print(value);

  if(value < 500)
  {
    digitalWrite((led,. HIGH));
    Serial.println("  -> LED ON");
  }
  else
{
  digitalWrite(led. LOW);
  Serial.println(" -> LED OFF");
}
delay(500);
  // put your main code here, to run repeatedly:

}