Feature Idea: Show from which direction the cursor is coming

[Alaz-Oz]

It would be nice if it fades or resizes from the direction from which it is coming. Example,
If coming from top to bottom, then it resizes from top to the point where it is currently.

              █           ▆            ▁
              █   =>      █    =>      █   =>       ▆    =>
              █           █            █            █             █

anim step =   1           2            3            4             5

Something like the illustration.