Haha no script this time, I wish I had some sort of tool for help, but that would require a web scraper + some method of determining which images actually are icons, so that's just waaayyy too much for just one round :D instead I'm using a manual algorithm where I first index everyone's community using the calendar view, then use that info to randomize posts and then pick a randomized icon from there. It's a lot of work but after doing it many many times I've developed ways to make it a bit faster, but it still depends a lot on how many non-icon posts there are and how many icons I need to reupload!