int x = 150;
int y = 150;
int d = 150; //diameter
int n = 10; //recursions

void setup() {
  size(300,300);
  background(0);
  noFill();
  stroke(255);
  smooth();
  noLoop();
}

void draw() {
  Curlicue (x, y, d, n);
}


void Curlicue(float x, float y, float d, int num) {
  ellipse(x, y, d, d);
  if (num > 1) {
    num = num - 1;
    float a = random(0, PI);
    float newx = x + cos(a) * 4.0 * num;
    float newy = y + sin(a) * 4.0 * num;
    Curlicue (newx, newy, d/a, num);
  }
}