​

function setup() {

  createCanvas(1024, 400);

  mic = new p5.AudioIn();

  mic.start();

}

​

function draw() {

  background(220);

  let level = mic.getLevel();

  let ellipseSize = map(level,0,1,10,300);

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

if (level > 0.1) {

    background(random(255), random(255), random(255));

  }

}

​