The below links provide tutorials on how to write basic elements of GeN.

Notes - http://gen.ucoz.net/index/notes/0-4

Rhythms - http://gen.ucoz.net/index/rhythms/0-5

Multiple Parts - http://gen.ucoz.net/index/multiple_parts/0-6

Before the Bar - http://gen.ucoz.net/index/before_the_bar/0-7

Dynamics - http://gen.ucoz.net/index/dynamics/0-8

Same Rhythm with Multiple Notes - http://gen.ucoz.net/index/same_rhythm_with_multiple_notes/0-9

Keep in mind the syntax _ in the tutorials indicate one blank space.