I saw this art on the street and thought it must be a relic from Lascaux! What does it make you think of?
My new blog friend from Barcelona had this comment to make. I hope she will not mind that I moved her observation to the text. I translated it via Google from Spanish.
” It looks like he’s used the background itself to create a kind of cave drawing. I think the idea is very original, using what was already there and letting the shapes emerge almost on their own. It’s one of those details that surprise you when you look a little more closely.” For her comment in Spanish, please see the comment section.
get back, lauretta! 
Parece que ha aprovechado el propio fondo para hacer una especie de dibujo de cavernas. La idea me parece muy original, usar lo que ya estaba ahí y dejar que las formas aparezcan casi solas. Es uno de esos detalles que te sorprenden cuando miras con un poco más de atención.
Hi! Thanks for commenting! Here is a Google translation of your comments. It looks like he’s used the background itself to create a kind of cave drawing. I think the idea is very original, using what was already there and letting the shapes emerge almost on their own. It’s one of those details that surprise you when you look a little more closely.
I agree! I was very attracted to this original art based on a found object!