[Joe Mangrum](https://www.facebook.com/joe.mangrum.art) has over 550 of these extraordinary sand paintings in streets of New York City. San Francisco and Chicago. He spends up to 8 hours on each piece. They are all made from colored sand and when the wind blows they will disappear. Some of them are almost hypnotic.
Watch Joe in this video called “Asynchronous Syntropy” a “Swept Away project” at Museum of Arts and Design NYC.