by Cheerful Madness!!
This rectangle pattern has companions! https://www.spoonflower.com/fabric/6524627-atlantic-ocean-rectangles-by-cheerful-madness-by-cheerfulmadness_cartoons and https://www.spoonflower.com/fabric/6524622-pacific-ocean-rectangles-by-cheerful-madness-by-cheerfulmadness_cartoons