Composition in #ff0000, #0000ff and #ffff00

The puzzle image and body filename hint at Piet Mondrian, a well known pioneer of abstract art, and the title hints at Mondrian's 'Composition with Red, Yellow and Blue'. The body filename, in its entirety, reads 'Mondrian with message'. But what could all this mean?

Looking at the painting in the image, it looks like it may not be a true Mondrian. If we have had some experience with esoteric programming languages before, we may even immediately recognise the framed work as an instance of the Piet programming language! If we isolate the program and run it through a Piet interpreter, we see that the program returns an output of Victory Boogie Woogie, hence the answer.