Tetractys, a poetic form invented by Ray Stebbing, consists of at least 5 lines of 1, 2, 3, 4, 10 syllables (total of 20). Tetractys can be written with more than one verse, but must follow suit with an inverted syllable count. Tetractys can also bereversed and written 10, 4, 3, 2, 1.