The series "Signs of Life" concentrates on the idea of a universally comprehensive picture language made up of mundane objects like the paintbrushes, flashlights and folding chairs Craig-Martin has made into a screensaver (which is available from MoMA.org) and objects from the art world, of which he says, "To draw Piero della Francesca] is the same thing to me as drawing a shoe." Or, as he demonstrates, as drawing a Seurat. Canvases and wall-filling...