public void initTruckCrane() {
        for (int i = 0; i < 20; i++) {
            truckCranes[i] = new TruckCrane(assetManager);
            rootNode.attachChild(truckCranes[i]);
            truckCranes[i].setLocalTranslation(400f + (4.5f * i), 0, -11f);
            truckCranes[i].rotate(0, FastMath.PI / 2, 0);
        }
    }