public void initTrucks() {
        for (int i = 0; i < 20; i++) {
            trucks[i] = new Truck(assetManager);
            rootNode.attachChild(trucks[i]);
            trucks[i].setLocalTranslation(401.2f + (4.5f * i), 1.25f / 6, -3.5f);
            trucks[i].rotate(0, -FastMath.PI / 2, 0);
        }
    }