Perhaps fortunately, only one example of this has survived that was composed in 1967. I recently found it stuck in a book for a book mark. Typical of my conventional unconvention, it is of the form nine, four, four. What the hey.... it was the sixties and convention was not the way.
The beauty of this form however is the limitation forcing a concise word picture.
gray is shining brightly today
Perhaps we'll see
The sun sometime.
The accompanying "art" was on the index card I had written it on.
For real haiku see ....... Haiku