#define LED 13
void setup() {
  pinMode(13, OUTPUT);
  Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly:
  int v = analogRead(A0);
  if (v > 111)
  {
    digitalWrite(13, HIGH);
  }
  else{
    digitalWrite(13,LOW);
  }
  Serial.println(v);
  delay(500);
}