Another problem that i'm experienicing while dealing with button menus and other things involving rollover states,hope you guys will hepl me

Here is a sketch of what i want.




I have 4 different buttons.And what i want is this-when someone goes over each of them,this circle in the middle with an arrow must go and point to that button.Now there are couple of problems.

So, for example,if I roll over on btm4,the circle goes around in a speed let's say 12fps and on rollout that circle goes the same way back.And for each button the same action.

I have problems with tweening more then two buttons don't know why.So is there an easy way or some sort of tutorial or an example to follow.

I need help!!!