A villanelle is a nineteen-line poem with two repeating rhymes and two refrains. The form is made up of five tercets followed by a quatrain. The first and third lines of the opening tercet are repeated alternately in the last lines of the succeeding stanzas; then in the final stanza, the refrain serves as the poem’s two concluding lines. (Ex. Dylan Thomas's "Do not go gentle into that goodnight") All topics are accepted.