Once thrown, stones vex recall of pool
and sky's water-mirror shatters.
Ripples and sun's rayed image duel
once thrown stones vex recall of pool.
The splattered, tattered mends by rule-
Smoothness blends anew what scatters
once thrown stones vex recall of pool
and sky's water-mirror shatters.

Glenn Bagshaw

http://www.poemhunter.com/poem/nature-s-lesson-602-triolet/