int vr_pin = A0;  // Potentiometer pin
int led_pin = 10; // LED pin

void setup() {
  pinMode(vr_pin, INPUT);   // Corrected the pinMode function
  Serial.begin(9600);       // Initialize serial communication at 9600 bps
}

void loop() {
  int vr = analogRead(vr_pin); // Read the analog value from the potentiometer
  int vrl = map(vr, 0, 1023, 0, 255); // Map the analog value to 0-255 range
  analogWrite(led_pin, vrl);   // Write the mapped value to the LED
  Serial.println(vrl);         // Print the value to the serial monitor
  delay(500);                  // Wait for half a second
}