const noteValues = [60, 63, 67, 70, 72];

let isPlaying = false;

​

function mousePressed() {

  Tone.start();

  print("Audio started!");

  // const midiNote = int(random(0, 90));

}

​

function setup() {

  createCanvas(400, 400);

  background(0);

  fmSynth = new Tone.FMSynth().toDestination();

}

​

function draw() {

  if (mouseIsPressed) {

    if (!isPlaying) {

      isPlaying = true;

      const midiNote = noteValues[int(random(0, noteValues.length))];

      const freq = Tone.Frequency(midiNote, "midi").toFrequency();

      fmSynth.triggerAttack(freq);

    }

    noStroke();

    fill(0, 255, 255, 50);

    translate(mouseX, mouseY);

    rotate(random(-PI, PI));

    square(0, 0, 50);      

  } else {

    if (isPlaying) {

      isPlaying = false; 

      // release note 

      fmSynth.triggerRelease();

    }

  }

}