I noticed that the right most disk is occasionally replaced by a new disk and all the other disks move to the left and the last one falls off.

• 我注意到有时最右边的圆盘的位置会被一个新的圆盘所取代，期间所有其他的圆盘都向左移动，而且原先最左边的圆盘从队列中被剔除。