markalarsen - looks like the shadows of the plant to me? Yeah, something simple with natural colors could have gone on the wall...
On another note about the FR20s, here is a YouTube video of Paul explaining the difference between the woofers of the FR20s to that of it's bigger brother, the FR30s. Some good and interesting comments below the video as well:
https://youtu.be/lUZeR-3j85U