#define vp 36
const byte LED = 2;
void setup() {
  pinMode(LED,OUTPUT);
  Serial.begin(9600);
}
void loop() {
  unsigned int VR = analogRead(vp);
  if (VR>2047){ 
    digitalWrite(LED, LOW);
    delay(500);
  }else{
    digitalWrite(LED,HIGH);
    delay(500);
  }
}