function preload() {

  Sound = loadSound('Piano.mp3');

}

​

function setup() {

  let canvas = createCanvas(400, 400);

  background(225);

  textAlign(CENTER, CENTER);

  textSize(18);

  text('Click to play and pause',width / 2, height / 2) ;

}

​

​

function mousePressed() {

  if (Sound.isPlaying()) {

    Sound.pause();

  } else {

    Sound.play();

  }

}

​