Who does what, where and when?
Our worship is described by our liturgy which is what we say and sing (about ourselves and Almighty God, insofar as we can say anyting about God) and also how we move.
This customary is offered so that those who are assisting in the liturgy can avoid bumping into one another. The essential thing to remember is to do things in slow motion - and any mistakes will be hard to spot!
After a while all this becomes like riding a bike, and you wonder what all the anxiety was for in the first place.
If you are curious, have a look at the attached pdf.