function setup() {

  createCanvas(400, 400);

  Mic= new p5.AudioIn()

  Mic.start()

}

​

function draw() {

  var MicLevel=Mic.getLevel()

    var Grayscale=map(MicLevel,0,1,0,255)

clear()

  fill(Grayscale*random(0,Grayscale),Grayscale*random(0,Grayscale),Grayscale*random(0,Grayscale))

  circle(200,200,100)

}