public SeaCrane(AssetManager assetManager) {

        Material zeekraanMat = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
        zeekraanMat.setColor("Color", ColorRGBA.Green);

        Spatial zeekraan1 = new Geometry("ColoredBox", new Box(1f, 7.5f, .5f));
        Spatial zeekraan2 = new Geometry("ColoredBox", new Box(1f, 7.5f, .5f));
        Spatial zeekraan3 = new Geometry("ColoredBox", new Box(1f, 7.5f, .5f));
        Spatial zeekraan4 = new Geometry("ColoredBox", new Box(1f, 7.5f, .5f));
        Spatial zeekraan5 = new Geometry("ColoredBox", new Box(1f, .5f, 3.5f));
        Spatial zeekraan6 = new Geometry("ColoredBox", new Box(1f, .5f, 3.5f));
        Spatial zeekraan7 = new Geometry("ColoredBox", new Box(10f, .5f, 1f));

        zeekraan1.setMaterial(zeekraanMat);
        zeekraan2.setMaterial(zeekraanMat);
        zeekraan3.setMaterial(zeekraanMat);
        zeekraan4.setMaterial(zeekraanMat);
        zeekraan5.setMaterial(zeekraanMat);
        zeekraan6.setMaterial(zeekraanMat);
        zeekraan7.setMaterial(zeekraanMat);

        zeekraan1.setLocalTranslation(0, 7, 0);
        zeekraan2.setLocalTranslation(0, 7, 6);
        zeekraan3.setLocalTranslation(4, 7, 0);
        zeekraan4.setLocalTranslation(4, 7, 6);
        zeekraan5.setLocalTranslation(0, 15, 3f);
        zeekraan6.setLocalTranslation(4, 15, 3f);
        zeekraan7.setLocalTranslation(-2, 16, 3f);

        attachChild(zeekraan1);
        attachChild(zeekraan2);
        attachChild(zeekraan3);
        attachChild(zeekraan4);
        attachChild(zeekraan5);
        attachChild(zeekraan6);
        attachChild(zeekraan7);
    }