The painting blank is an example of a political work of art

Assuming the painting "Blank" you are talking about is made by Yves Klein, I would say it has a oppression point of view coming through. The black boarders on the canvas show that the inside in being oppressed by not being able to go off the canvas. This may be a way of saying oppression of a religion, gender or Race. Most likely, Race.

logic homicide dude i really appreciate it

i'm not sure i completely understand your question, but i will do my best.

i think the answer you are looking for is sequence. (see below)

a repeated melodic fragment would be best defined as repetition, while repeated chords (different or the same) could be a chord progression. however, you then mentioned the chord and melodic fragment beginning on higher or lower pitches, in that case, the answer could be best defined as a sequence. the definition of a sequence is as follows: "the restatement of a motif or longer melodic (or harmonic) passage at a higher or lower pitch in the same voice."

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