Generate me 3 separate images. The perfect size and dimensions to use for a background image in a PowerPoint presentation. They should be simple, not obscure any text, and be a subtle nod to Indigenous Australians without just being a an Aboriginal style pointillism piece or a carbon copy of the Aboriginal flag. Between each of the three images, the main colour should Alternate between black, red and yellow, with accents comprised of the other two colours (black background, red and yellow accents; red background, black and yellow accents; yellow background, black and red accents). See more