How do I get a unit to twirl round like in escapes?

[Emo-Angel]

You know in an escape, how do you get something like aload of wisps to triwl round in a circule where one unit in the middle stays still and loads of them circule round it

 

[TurboJyri]

Those are called wisp wheels, try searching for those. There is guide around how to make one.