!7

static int size = 33;

p {

  repeat with ms sleep 100 {

    RGBImage orig = rgbShootScreen(rectAround(mousePointer(), size, size));

    RGBImage img = new RGBImage(size, size, Color.gray);

    int radius = size/2-2;

    L<Pt> points = circlePoints(size/2, size/2, radius);

    int n = l(points);

    float[] values = new float[n];

    for i to n:

      values[i] = orig.getPixel(points.get(i)).getBrightness();

    values = cyclicBlur(values);

    L<Int> minima = cyclicLocalMinima(values);

    for (int i : minima)

      rgbMarkPoint(img, points.get(i));

    for (Pt p : points)

      img.setPixel(p, orig.getPixel(p));

    alwaysOnTop(quickShowZoomedImage(img));

  }

}