Triolet

Structure:
* 8 Lines
* two lines repeated, 1st line, 4th
* a b a a a b a b
* Opening 2 couplet repeated at end

Characteristics:
Short event or story put into song. Folk ballads are one stanza, literary ballads are more formal and can be composed of several stanzas.

Origins:
Also called popular ballads, ballads were passed orally from generation to generation as songs. The song would usually tell a story and include a shock refrain (impacting repetition) without going into detail of setting, characterization, etc.
Example:

Around the house the flakes fly faster,
And all the berries now are gone
From holly and cotoneaster
Around the house. The flakes fly! faster
Shutting indoors the crumb-outcaster
We used to see upon the lawn
Around the house. The Flakes fly faster
And all the berries now are gone!

Thomas Hardy