Creating "will close in 10 sec" code.

k so i search alot but i cant find any thread that really helps me,

my question is that HOW can i create this kind of text draw that is as this,





then after 15 sec the box closes?

I do know how to create a text draw, and destroy it after a couple of seconds by timers, but my question is how to display the time remaining using text draws?



Thank you for the help!