Repetition or reiteration. Whatever it’s called I like doing it. With variation of course.
This piece is a variation on a theme. Some music is written like that. Sergei Rachmaninoff’s Rhapsody on a Theme of Paganini is an example that springs to mind.
One Japanese Optical motif is repeated and varied and thats it. Although Ive mentioned a genius does not mean this piece is of the same quality.