In addition to Tony Moss's latest, I suggest that the haiku would make an elegant form for sundial mottoes. Webster's Seventh defines 'haiku' as an unrhymed Japanese poem of three lines containing 5, 7, and 5 syllables respectively and referring in some way to one of the seasons of the year.
Example: I show the sun's paths. At noon my shadow's longest When springtime's ended. Here's one for Mac Oglesby's hours-to-sunset dial at his airport: Go. Fly your airplane! My shadow tells you now, when Your craft won't have one. George McDowell
