createCanvas(600, 600);

}

​

function draw() {

  background(255);

  stroke(0);

  strokeWeight(3);

  noFill();

  noLoop();

  var nPoints = 60;

  var cx = width/2;

  var cy = height/2;

  var b_radius = 100;

  beginShape();

  fill('lightgrey');

  for(var i = 0; i < nPoints; i++){

    var t = map(i, 0, nPoints, 0, TWO_PI);

    var radius = b_radius + random(-5,5);

    var px = cx + radius * cos(t);

    var py = cy + radius * sin(t);

    smooth();

    curveVertex(px,py);

  }

  endShape(CLOSE);

}