Green Line (2007) is the documentation of a performance by Francis Alÿs in which he walks in Jerusalem along on the Green Line, the border set out in the 1949 Armistice Agreements between the armies of Israel and those of its neighbors, while carrying a leaking can of green paint.
As he walks along, the green paint slowly dribbles out of a small hole in the can, leaving behind a wavering line on the ground behind him. On his journey, he crosses through various neighborhoods and streets, inevitably passing through the many security checkpoints that divide the city. A videographer follows Alÿs on his walk, documenting his travel and the green line that is drawn behind him the entire way.