const int potPin = A0;   // Potentiometer input pin
const int ledPin = 2;    // LED output pin

int targetValue = 512;   // The target value for the potentiometer
int tolerance = 10;      // Tolerance for timing

void setup() {
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  int sensorValue = analogRead(potPin);
  Serial.println(sensorValue);

  if (abs(sensorValue - targetValue) <= tolerance) {
    digitalWrite(ledPin, HIGH); // Turn on the LED when timing is right
  } else {
    digitalWrite(ledPin, LOW); // Turn off the LED when timing is wrong
  }
}