End of the Artist. Contribution to Street Art.

This building is under construction and to block the windows in basement they used some old board they found laying around. They tagged a piece of wood to it from outside to prevent the house from thieves. I am sure they had no idea what an exhibition they installed for passers by. No one really cares anyway, people just rush by without hardly noticing it. So, who is that painter whose pieces finally found a practical usage? Being always kind of naïve I hope for him/ her that he/she just switched to another creative period and threw the old junk on the street.