I am certain that this has come up but i couldnt find anything with search. 

Title pretty much says it. I am looking for something to let the person know how long until the upload is done. I am thinking the light window(?) would look good. If I used the wrong name then it is the effect in tidypics where the screen is black except for a small square in the middle.

Paid or not let me know if such a creature exists

Thanks in advance