Jasper johns, three flags, 1958 is not meant to be patriotic. it is a process of pigment suspended in molten beeswax called encaustic, and the subject matter is more a celebration of popular culture and:

He may have made "Three Flags" to clarify the realism of American culture. This is an illustration of how Johns frequently used imageries and methods from popular mass culture, stuffs like promotion, comic volumes, and as Johns formerly said, “Things the mind already knows.” Similar to the American flag.  His work appeared partly a response to Abstract Expressionism, an art drive of the time whose images had no identifiable content at all.