The tetractys is a fivelined verse form invented by Ray Stebbings. Its challenge is to express a complete thought within the narrow compass of twenty syllables. The five lines contain the following syllable count: 1, 2, 3, 4, 10. Multiple stanzas are allowed, but the series is reversed and alternated from one stanza to the next.
"Euclid, the mathematician of classical times, considered the number series 1, 2, 3, 4 to have mystical significance because its sum is 10, so he dignified it with a name of its own — tetractys."

Complete Thought is formed In just five lines With a total of twenty syllables.
Reverse the series to add a stanza,

"Io!"
It recreates the Golden Age of yore,

Four,
When they were all gone, he counseled her thus:
