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


}

void loop() {
  // put your main code here, to run repeatedly:
  int v = analogRead(A0);
  Serial.println(v);
  if(v>500)
  {
    digitalWrite(13, HIGH);
    Serial.println("Light On");
  }

  else 
  {
    digitalWrite(13,LOW);
    Serial.println("light off");
  }

}