!7

static int w = 32, h = 16, ww = 400, hh = 200;

p-substance {
  BufferedImage src = screenshot();
  int srcw = src.getWidth(), srch = src.getHeight();
  BufferedImage dest = newBufferedImage(ww, hh);
  for (int y = 0; y < hh; y += h)
    for (int x = 0; x < ww; x += w) {
      int srcX = random(srcw-w), srcY = random(srch-h);
      copyImagePart(src, srcX, srcY, dest, x, y);
    }
  showImage(dest);
}