​

function setup() {

  createCanvas(300,300);

  mic=new p5.AudioIn();

  mic.start();

}

​

function draw() {

  // background(255);

  vol=mic.getLevel();

  diam=map(vol,0,1,1,3900);

  if(diam>50){

  changeBackground();

  }

  fill(255);

  ellipse(width/2-30,height/2-80,30,30);

  ellipse(width/2+30,height/2-80,30,30);

  fill(0);

  ellipse(width/2-30,height/2-80,10,10);

  ellipse(width/2+30,height/2-80,10,10);

  fill(0);

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

  // console.log(vol);

  function changeBackground(){

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

  }

}