Requested WoW macro

I would like to have a macro that will cast on my focus' target.
Example for this: I PvP on my moonkin, so I'm often multi-dotting. I want to send my starsurges, wrath and starfire to the target caller's target (target caller being my focus) and be able to cast these same spells at my own target when the TC is dead or too far away. Please and thank you.