!752

static int area = 11;

p {
  while licensed {
    BWImage img = shootScreenBW(mouseArea(area));
    ImageSurface is = quickShowZoomedImage(img.toRGB(), 10);
    Pair<Float, Float> c = bwDarkCentroid(img);
    setFrameTitle(is, formatDouble(c.a, 1) + "/" + formatDouble(c.b, 1));
    sleepSeconds(0.1);
  }
}