int sensorPin = A0;   // selecting the input pin for the potentiometer
int ledPin = 13;      // selecting the pin for the LED
int sensorValue = 0;  // this is a variable to store the value coming from the sensor

void setup() {
  pinMode(ledPin, OUTPUT); // declare the ledPin as an OUTPUT
}

void loop() {
  sensorValue = analogRead(sensorPin); // reading the value from the sensor
  digitalWrite(ledPin, HIGH);  // turning the ledPin on
  delay(sensorValue);  // delaying the program for <sensorValue>
  digitalWrite(ledPin, LOW);  // turning the ledPin off
  delay(sensorValue); // delaying the program for <sensorValue>
}