createCanvas(600, 600);

}

​

function draw() {

  background(50,100,80,50);

  stroke(255);

  strokeWeight(1);

  noFill();

  var turns = 200;

  var points = 60* turns;

  var cx = width/2 ;

  var cy = height/2;

  var radius = 2;

  beginShape();

  for (var i=0; i<points; i++){

    var t = map(i,0,(points)-1,0,TWO_PI*turns);

    var px = cx + radius * cos(t);

    var py = cy + radius * sin(t);

    vertex(px, py);

    radius = radius *1.0005;

  }

  endShape();

}