Macro help on a monday please ( Healing main target, if no target heal main) for pvp healing

Hi, been looking around on the forum a bit, but couldnt seem to find the macro i was looking for. might be my poor understanding of macros though:(

So the actions i want is as follows:

I play a warr as a main and have priest and lock and mage on follow and dps etc. I have been doing pve for a little while and was trying to do some bgs for a change. But then it would be nice to have a macro so that i can heal my mains target( friends), and if a foe or noone is seleced on my main the priest would heal my main.

Is that possible?

Thankfull for any help i can get


EDIT:

Found this macro that might do the trick, checking it out now

#showtooltip renew
/cleartarget
/target bignbold
/cast [target=targettarget,help,nodead,exists] Renew; [target=target,help,nodead,exists] Renew; [target=help,nodead,exists] Renew

'Not sure about the target=help. This will heal your main's target, or your main.

Code:

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#showtooltip Renew
/cleartarget
/target bignbold
/cast [target=targettarget,help,nodead][help,nodead]Renew

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thanks, will try that out