int led_pin = 5;
int VR_pin = A5;
int val;

void setup() {
  Serial.begin(9600);
  pinMode(5, OUTPUT);
  pinMode(A5, INPUT);
}

void loop() {
  val = analogRead(A5);
  Serial.println("VR value: ");
  Serial.println(val);
  if(val > 512){
    digitalWrite(5, HIGH);
  }
  else{
    digitalWrite(5, LOW);
  }
  delay(500);
}