Carnival - Divine Shield Timer

I coded this addon after I got fed up of wasting mana on paladins who had activated their divine shield in PvP, I also wanted to know how long the shield had left, so that I could start casting before it had worn off completly.

The addon displays a visual countdown to when the shield will expire. Aswell as that it will give you an audio warning (the standard dong sound) and a text warning that your spell cast has been halted.