int light;

void setup() {
  pinMode(13, OUTPUT);
  Serial.begin(9600);// put your setup code here, to run once:

}

void loop() {
   light = analogRead(A0);
  
  if(light>511) {
    digitalWrite(13, HIGH);


    }else{
      digitalWrite(13, LOW);

    }



  Serial.println(light);
  delay(100);// put your main code here, to run repeatedly:

}