 He installed a 16-foot mirror with a line of real cocaine running down the center, in which visitors were welcome to partake.Publicity stunt, peace offering, minimalist sculpture, or indictment of the greed and glamour of the art world, it changed the sensation associated with his name.The following year Pruitt held his first solo show, “101 Art Ideas You Can Do Yourself,” where he applied humor to the genre of language-based conceptual art.