Fart machine for Rosalina - source

pruttemaskine.ino

void fart(int pitch) {
  int duration = random(300, 1000);

  tone(8, pitch, duration);
  delay(duration);
  
  noTone(8);  
}

int fartPitch() {
  return map(analogRead(2), 0, 1023, 60, 110);
}

void setup() {
  pinMode(4, INPUT);
  pinMode(13, OUTPUT);
}

int buttonState = 0;

void loop() {
  buttonState = digitalRead(4);

  if(buttonState == HIGH) {
    fart(fartPitch());
    digitalWrite(13, HIGH);
  } else {
    digitalWrite(13, LOW);
  }
  
  delay(50);
}