static RGBImage rgbMarkPoints(RGBImage img, Color color, int size, Pt... points) {
  for (Pt p : points)
    rgbMarkPoint(img, p, color, size);
  ret img;
}

static RGBImage rgbMarkPoints(RGBImage img, Pt... points) {
  ret rgbMarkPoints(img, Color.red, 3, points);
}

static RGBImage rgbMarkPoints(Iterable<Pt> points, int size, RGBImage img) {
  ret rgbMarkPoints(img, Color.red, size, toTypedArray Pt(points));
}