void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(12, OUTPUT);
  pinMode(14, OUTPUT);
}

void loop() {
  int v = analogRead(14);
  Serial.println(v);
  int intensity =map(v,0,4095,0,255);
  analogWrite(12,intensity);
  delay(10); // this speeds up the simulation
}