function setup() {

  createCanvas(400, 400);

  textAlign(CENTER, CENTER);

  mic = new p5.audioIn();

​

  every(1).seconds

    .show(drawScene1)

    .show(drawScene2)

    .show(drawScene3);

}

​

function draw() {

  background(220);

}

​

function drawScene0() {

  let vol = mic.getLevel();

  circle(200, 200, vol + 100);

  text('00:00', 200, 200);

}

function drawScene1() {

  square(vol, 200, 200);

  text('00:01', 200, 200);

}

function drawScene2() {

  line(0, 0, vol);

  text('00:02', 200, 200);

}

​