BAD ART CHALLENGE IDEA; INVERT; MAKE THE COLORS ON YOUR DEVICE INVERTED, THEN DRAW ANYTHING WITH "NORMAL" COLORS.
IF THEY'RE CHARACTERS, JUST CHANGE THEM ENOUGH SO THAT THEY'RE SIMILAR YET DIFFERENT.
THEN IF YOU INVERT BACK, THE PICTURE / ANIMATION YOU MADE WILL LOOK WEIRD.
YOU COULD POST WHATEVER YOU DID, BUT POST BOTH IMAGES.