No I didn't know ... Thanks for the info! That's great !
And I know that in Lyon in France, there is an artist who also fills the holes in the sidewalks, the road and the walls ... and who does super nice things ... If you want to see, here is an article about him: https://www.20minutes.fr/arts-stars/culture/2294723-20180626-lyon-decouverte-ememen-artiste-repare-colore-trottoirs