自己编的制作红色小球沿一条带封闭路径的下旋螺线运动的实时动画。-their series produced a small red ball with a closed along the path under the rotating spiral movements of real-time animation.

实现实时动画：红色小球沿一条封闭路径的下旋螺线运动。(Realize real-time animation:a red ball along a closed path downward movement.)