 Ay-O's attachment to Douanier Rousseau's work is another proof of his interest for naïve art.In 1987 he did a series of Rainbow Happenings, with Rainbow Happening #17 being a 300m Rainbow Eiffel Tower project in Paris.As a rainbow artist Ay-O's work embraces abstraction more decisively than in his previous period, and human form when present in a rainbow context becomes itself abstract.