Beautiful green calligraphy at community garden Klunkerkranich.
This is located at their entrance ramp, formerly built for cars but now used as pedestrian access to the parking lot roof which was converted into a cafe and music venue, plus a very nice community garden.
I will come back to check out how their moss is growing. In the meanwhile, there are many online tutorials you can use for guidance to make your very own moss art. Much more environmentally friendly than spray paint!