Moss and Algae Painting with the WaterColorBot By Lenore Edman on February 20, 2014 Gregg posted on twitter: WaterColorBot experiments: moss+yogurt and algae+iron paint. With William Jennings. We’ll be looking forward to seeing followups on these experiments! Print PDF This entry was posted in Art, Science, WaterColorBot and tagged art, watercolorbot. Bookmark the Permalink.