A mindworm won't leave me alone so I've been indulging it. One of the things I wanted to do was create a logo that involved the slashing red circle universal Prohibition symbol over an image. I don't have software to do that and can't see an easy way of doing that online (you'd think there'd be a Web 2.0 app for that somewhere!).
My Google search found the above online app and I did three quickies that aren't at all what I was thinking of but decided to try them anyway.
I added the crappy jaggy rectangles and circles in Microsoft Paint, hence they look like ass.