Warlock autoseduce macro

What I am trying to do is make a macro that will seduce a target and keep it autoseduced until i am ready to kill it. For those of you who do not know how autoseduce works if you /petattack a target with a succubus then switch targets and /petattack again the succubus will seduce the first target, and keep seducing it until it either runs out of mana or (i believe this is true) the mob comes within a certain range of the succubus. After autoseduce is broken the succubus will attack the second target. I am trying to make a macro that will /petattack my focus, then /petattack another target so the succubus will autoseduce my focus so i don't have to keep pressing my seduce button. What i have tried so far is:

/petattack [target=focus]
/petattack

I was hoping this would work by attacking my focus, then attacking my current target in order to start autoseducing the first, but unfortunately all it does is attack my current target. I know that /petattack [target=focus] commands the pet to attack my focus, then /petattack commands it to attack my current target. But I don't know how to incorperate the two commands so it will enable autoseducing. Any ideas?

I tried that too, but ended up just assigning another key to /petattack and using two commands.