int LEDpin = 8; //pin 8 will control the LED

void setup() {
  // put your setup code here, to run once:
  pinMode(LEDpin,OUTPUT);
}

void loop() {
  // analogRead(A0) will give us the changing voltage value as we
  //move the wiper of the potentiometer.
  int value = analogRead(A0);
  digitalWrite(LEDpin, HIGH);   //LED ON
  delay(value);   // voltage value
  digitalWrite(LEDpin, LOW);     //LED OFF
  delay(value);
  Serial.println(value);  
  //Serial.println() is used to print the voltage values on the console
}