​

function setup() { 

  createCanvas(400, 400);

  drumLoop = loadSound('drums.wav');

} 

​

function draw() { 

  background(220);

  rect(0, 0, 50, 50);

}

​

function mousePressed() {

  if (mouseX < 50 && mouseY < 50) {

    if (drumLoop.isPlaying()) {

      drumLoop.stop(); 

    } 

    else {

      drumLoop.play();

    }

  }

}