Villanelle of the third and fifth stanzas. The rhyme-and-refrain pattern of the villanelle can be schematized as AbA abA abA abA abA abAA where letters ("a" and "b") indicate the two rhyme sounds, upper case indicates a refrain ("A"), and superscript numerals ( and ) indicate Refrain 1 and Refrain 2. The pattern is below set against "Do not go gentle into that good night" by Dylan Thomas: The villanelle has no established meter, although most 19th-century villanelles have used trimeter or tetrameter and most 20th-century villanelles have used pentameter. Slight alteration of the refrain line is permissible. With reference to
Do not go gentle into that good night before Christmas 1952. It has no title other than its first line, "Do not go gentle into that good night", a line that appears as a refrain throughout the poem along with its other refrain, "Rage, rage against the dying of the light". The poem currently remains under copyright, although the text is available online. The villanelle consists of five stanzas of three lines (tercets) followed by a single stanza of four lines (a quatrain) for a total of nineteen lines. It is structured by two repeating rhymes and two refrains: the first line of the first stanza serves as