static Rectangle defaultNewFrameBounds_r = new Rectangle(300, 100, 500, 400);

static Rectangle defaultNewFrameBounds() {
  ret swing(func -> Rectangle {
    defaultNewFrameBounds_r.translate(60, 20);
    var bounds = preferredScreenBounds();
    if (!bounds.contains(defaultNewFrameBounds_r))
      defaultNewFrameBounds_r.setLocation(bounds.x+30+random(30), bounds.y+20+random(20));
    ret new Rectangle(defaultNewFrameBounds_r);
  });
}