一个漂亮的五角星，一边自转，一边绕着一个圆形轨道旋转。旋转的同时五角星的大小也在不断变化，从小到大，再从大到小，依此循环-A beautiful five-pointed star, while the rotation, while rotating around a circular track. Pentacle the size of the rotation, while also changing, from small to large, then from big to smal