From a one quarter tag formation: Do a Scoot And Plenty and the ones who "Circulate" (as many positions as designated) will be the centers after they have turned their star half. They will be doing this (Box) Circulate as the outsides are doing the single file promenade one quarter around the outside to quarter in. It is the leaders in this center box who Roll Right to a Wave.
Gus Greene 1972
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.