private void drawQT(Graphics2D g2, Quadtree qt) {
        Rectangle ra = new Rectangle((int)(qt.bounds.x/scale), (int)(qt.bounds.y/scale), (int)(qt.bounds.width/scale), (int)(qt.bounds.height/scale));
        g2.draw(ra);
        if (qt.nodes[0] != null) {
            for (Quadtree q : qt.nodes) {
                drawQT(g2, q);
            }
        }
    }