A clean wall does not want graffiti.  Sprayed-on signs and signatures are provocation and protest.  But empty buildings and construction sites attract scrawls irresistibly.  It has always been so since humans began drawing on rocks and cave walls.  Some tags are highly creative.  A wall of massed signs becomes a range of invention, a textured field.  Here, my merging in of a glyphic animal, such as an antelope, intensifies the whole.