Walking on the bay yesterday, I saw a pebble that was a greenish-gray color that I always associate with my friend Sue; I picked it up. Then it seemed, out of all the many thousands of pebbles to choose from, my eye kept alighting on pebbles whose color I associated with Sue: russet, caramel, umber.
Robin and I, when we'd sift through the pebbles at the point, always thought we were choosing each one randomly, individually. (I sat in on a literature class that was reading Zen and the Art of Motorcycle Maintenence and wrote a paper about this process; I can't remember what the assignment was, but it was the most creative paper of my undergraduate years, and I hope Dr. Haba liked it [I can't recall].)
It became clear to us at some point though that choosing one prefigured the next choice: we unconsciously devised sets.
Like the Sue-colored set and the one below, I'll call it Sunset Set.