What is the degree of lightnees or darkness of a matiral

Take the tour on this website and describe three pieces in the art collection of the early cities. (site 1)

Order the events as they occurred in history. thomas edison and william dickson invent the kinetoscope. the view from the window at le gras is created. disney produces flowers and trees, the first color film. stanley kubrick revolutionizes special effects with 2001: a space odyssey. muybridge creates the horse in motion. francis ford coppola’s apocalypse now is selected for preservation by the library of congress. d. w. griffith directs the birth of a nation. marilyn monroe makes her film debut.

In "thirty are better than one" 1963 by andy warhol describe to what degree this image depicts rhythm or pattern