let isPlayingFirst = false;

​

function preload() {

  sound1 = loadSound('sound1.mp3');

  sound2 = loadSound('sound2.mp3');

}

​

function setup() {

  createCanvas(400, 400);

  background('pink');

}

​

function mousePressed() {

  if (!sound1.isPlaying() && !sound2.isPlaying()) {

    sound1.play();

    isPlayingFirst = true;

    sound1.onended(() => {

      if (isPlayingFirst) {

        sound2.play();

        isPlayingFirst = false;

      }

    });

  }

}

​