Here’s a responsive call to worship (or even a closing litany) from the Ministry Matters website.
Call to Worship for Advent
You know not when God comes.
There will be signs:
A flood to cover the earth,
the Red Sea parting,
the walls of Jericho tumbling,
a giant slain by a boy,
a barren womb birthing a son,
a man sleeping in a den of lions,
another surviving the belly of a fish,
a virgin conceiving in her womb!
God is coming!
Behold the signs!
~ from First Sunday of Advent Prayers and Litanies, posted on the Ministry Matters website. www.ministrymatters.com/