​

function setup() {

  createCanvas(400, 400);

​

  mic = new p5.AudioIn();

  mic.start();

​

  currentBgColor = color(220);

}

​

function draw() {

  background(currentBgColor);

​

  let micLevel = mic.getLevel();

​

  let ssize = map(micLevel, 0, 1, 0, 200);

​

  ellipse(width / 2, height / 2, ssize, ssize);

​

  if (micLevel > 0.1) {

    currentBgColor = color(random(255), random(255), random(255));

  }

}

​