Street art reinvents itself

A few weeks ago I was walking in Milan next to a building site. This is a detail picture of the enclosure of the site. Interesting effect, isn't it? Builders place the timber boards, people paint on them, then they are taken down and put up in the next site. Obviously the builders don't respect the composition of the image, unless they want to play jigsaws at work, so a different image comes out. Someone paints over it again, the whole thing is taken down and reassembled elsewhere in a different way and so on.

(picture by me)