Lua Help - Pitbull

[Talisia]

Once again I am here to ask for help with lua texts for my pitbull frames. I have no real clue when it comes to this sort of thing but usually I can pick away at some code I find to get my desired result. I have been searching for 2 days to try and find what I am after this time but to no avail! =(

I'm lookign for a way to do the following:

If 'missing' any priest buff, Foritude, Shadow Protection or Vampiric Embrace to show letters (i.e. F, SP or VE) on my player frame.

I was hoping aswell if I could find/copy a similar code I could also make it work to show when I am missing other auras, such as Inner Will/Fire and also auras for my Paladin.

I would be so grateful if some nice person was to help me with this, has me totally banging my head on the desk =(

Thanks in advance!