how one frame remains when you dlete the draw function

It looks like you posted twice on the same issue (https://support.khanacademy.org/hc/en-us/community/posts/41530633478413-how-one-frame-remains-when-you-delete-the-draw-function). 
Would you like to delete this post, since the other one has more information?  Thanks!

~ Janice, KA user