It's a bit of a cheat today, as I've used up most of my photo play time, trying to learn some new Photoshop techniques so instead of a totally new picture I'm posting a collage of several chain shots I've taken this week.
@lhart I put it together in Photoshop: A black background layer and then five layers above it with a rectangle placed on each with the shape tool, then dragged one image onto each of the layers and clipped it to it's shape layer. ( hope that makes sense.)