The Kurt Vonnegut Sestet is a simple form. It is a 6 line poem. It must rhyme, but the author gets to choose the rhyme scheme. The only requirements are that you must make it as good as you possibly can, and when it’s finished, it must be destroyed.
Lay
This form of poetry dates back to the 13th century and was often accompanied by music. In its traditional form in French and German, the lay poem was written in eight-syllable couplets.