final PVector t = new PVector(20, 30, 60);

void setup() {
  size(450, 400);
  noLoop();
  background(0, 0, 200);
  stroke(-1);
  sc(7, 400, -60, t);
}

PVector sc(int o, float l, final int a, final PVector s) {
  if (o > 0) {
    sc(--o, l *= .5, -a, s).z += a;
    sc(o, l, a, s).z += a;
    sc(o, l, -a, s);
  } else line(s.x, s.y,
    s.x += cos(radians(s.z)) * l,
    s.y += sin(radians(s.z)) * l);
  return s;
}