Garden Graffiti

I think I might have to show style of graffiti this to my mom - it would be perfect for our house! I even found a how to for her to look over. Upon further research, I read mixing yogurt, water, and live moss in a blender, painting it on a wall and spritzing it with water everyone once in awhile works as well. Apparently the moss will grow in the shape that you painted it with!

I wonder if either of these would work!