let fft; // the sample a sound formula

​

function setup() {

  createCanvas(400, 400);

  mic = new p5.AudioIn();

  mic.start();

​

  fft = new p5.FFT();

  fft.setInput(mic);

}

​

function draw() {

  background(255);

  background(220);

  let level = mic.getLevel();

  console.log(level);

  ellipse(width / 2, height / 2, level * 2000, level * 2000);

   if (level > 0.1) {

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

   }

}

​