int ledPin = 9;      // LED connected to digital pin 9
    int analogPin = A3;   // potentiometer connected to analog pin 3 (A3)
    int val = 0;         // variable to store the read value
    int laserPin = 7;

    void setup() {
      pinMode(ledPin, OUTPUT);  // sets the pin as output
      pinMode(laserPin, OUTPUT);  // sets the pin as output
    }

    void loop() {
      val = analogRead(analogPin);  // read the input pin
      analogWrite(ledPin, val / 4); // analogRead values go from 0 to 1023, analogWrite values from 0 to 255
      analogWrite(laserPin, 1);
    }