   bg.setStartTime(Math.random());
                bg.setFPS(120 * Math.random());

                const bg2 = XE.Obj.CustomPrimitive.createDynamicPoi({
                    earth,
                    imageUrl: './assets/guangzhu/kuang_bai/kuang02.png',
                    configUrl: './assets/guangzhu/kuang_bai/kuang02.png.json',
                    position: [position[0], position[1], position[2] + 160*2],
                    scale: 0.15,
                    color: [...color],
                })