使用vrml编写的三维图像，内含有javascr ipt节点。按红色，绿色灯可以更换背景，按蓝色灯可以控制上面的圆柱塔转动-Vrml prepared using three-dimensional images, javascr ipt node contains. By red, green lights can change the background, press the blue light can control tower above the rotating cylinder