DENVER, CO - OCT. 20: Delton Demarest (working on the Michael J. Fox character "Marty") and two other artists use the side of a building at E. 20th Ave. and Sherman St. as their canvas as they paint a mural depicting scenes from the movie, "Back to the Future Part ll". In the movie, the characters of Marty, Doc, and Jennifer travel back to the future to tomorrow's date of Oct. 21, 2015. (Photo by Kathryn Scott Osler/The Denver Post via Getty Images)