MOSS GRAFFITI

Moss graffiti also called  eco-graffiti or green graffiti because it is eco-friendly as it doesn’t use any aerosols; what the “painting” needs is just a dash of water to thrive. Bear in mind, that choosing a right space for street art is very important too as in any case vandalism is a crime.

To get started you’ll need:
3 cups of moss (washed, clean of soil)
2 cups of buttermilk or 2 cups of yogurt (should be plain yogurt)
2 cups of water or beer
1/2 tsp of sugar
corn syrup (optional)
a blender that you probably don’t want to use other than for this

More info: wikihow