let c = 5;

​

​

function setup() {

  createCanvas(400, 400);

  background(220);

}

​

function draw() {

  let a = n * 137;

  let r = c * sqrt(n);

  let x = r * cos(a) + width/2;

  let y = r * sin(a) + height/2;

  fill(random(255));

  ellipse(x,y,10);

  n++;

​

}