public Container(AssetManager assetManager) {

        numbercontainers++;

        Box box = new Box(Vector3f.ZERO, 13f / 6, 2.5f / 6, 2.5f / 6);//13 bij 2.5
        Geometry container = new Geometry("Container", box);
        Material mat = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
        
            mat.setColor("Color", ColorRGBA.randomColor());
        

        container.setMaterial(mat);
        attachChild(container);
    }