Need help with making a (hopefully) simple remaining time on buff weak aura.

[wheat nymph]

Hi! I am trying to make what in my mind is a pretty simple aura, but I can't get it to work.
This is what I want to do: When 35 seconds remain on the Prismatic Projection buff, a star icon is shown in the middle of the screen to alert me to reuse the projection prism item. (I use this for RP and general tomfoolery.) Hopefully this makes sense. I don't know if this is the correct place to ask for a script to be made, let me know if my post makes no sense or smth.

[jade knoll]

Shouldn't be too hard, u can make a trigger that tracks the buff then in conditions u do something like this:

With the time u want instead of course

In seconds

So 35

Just use conditions and put a time

Just check for the spell/buff

and do something like this