1. prelude: the commander should first convey the basic rhythm and beat of the song to the choir members through gestures or passwords to help them get started.
2. the first chorus: members of the choir should have a clear starting point of notes, and the initial part can be sung by a singer, a group or all of them.
3. Chorus: The soundtrack of the chorus is more lively and brisk, so the commander should strengthen the rhythm control of the choir.
4. Afterplay: At the end of the whole chorus, the commander should use gestures or passwords to tell the choir members when to stop singing and how to finish.