public void createI(List<Iron> irons, int startX, int startY, int endX, int endY) {
        Iron template = new Iron(0, 0);
        for (int i = startX; i < endX; i += template.getWidth()) {
            for (int j = startY; j < endY; j += template.getHeight()) {
                Iron bs = new Iron(i, j);