static void fillTetragon(BufferedImage image, int x1, int y1, int x2, int y2, int x3, int y3, int x4, int y4, Color color) {
  Graphics2D g = image.createGraphics();
  g.setColor(color);
  g.fillPolygon(intArray(x1, x2, x3, x4), intArray(y1, y2, y3, y4), 4);
  g.dispose();
}