How do I get an outside line? http://cheapestbuynowreview.top/maps/sitemap23.html trileptal online The title refers to the green X that fills a small square of unpainted white paper at the left where the viewer can look through the screen of colour into illusionistic depth. There are other, tiny areas in the sheet where the white ground peeps through, but X marks the spot that Klee wants to draw our attention to. The joke is that by making that X he destroys the illusion. It turns a window back into a square of flat paper.