void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(11,INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
int x = analogRead(A0);
//Serial.println(x);
//delay(500);
if (x<512){
digitalWrite(11,LOW);
Serial.println("off");
}
else{
  digitalWrite(11,HIGH);
  Serial.println("on");
}

}