Street artist Mobstr tagged the same London wall over one year in a curious social experiment. He began on July 17th, 2014, and made his final graffiti tag contribution just a few months ago. Mobstr, who has undertaken similar street art projects before, explains how this cat-and-mouse game began:

“I cycled past this street of London on the way to work for years,” he writes on his website. “I noticed that graffiti stencil painted within the red area was ‘buffed’ with red paint. However, graffiti outside of the red area would be removed via pressure washing. This prompted the start of an experiment, or, if you like, an act of vandalism. Unlike other works, I was very uncertain as to what results it would yield. Below is what transpired over the course of a year.”

Google street-view shows part of the transformation.

More info: mobstr.org | Instagram (h/t: twistedsifter)

The wall:

The street artist:

The wall cleaner:

Street artist:

Cleaner:

Street artist:

Cleaner:

Street artist:

Cleaner:

Street artist:

Cleaner:

Street artist:

Cleaner:

Street artist:

Cleaner:

Street artist:

Cleaner:

Street artist:

Cleaner:

Street artist:

Cleaner:

Street artist:

Cleaner:

Street artist: