def METHOD_NAME(self):
    wd, ht = self.dims
    cpoints = ((0, 0), (wd, 0), (wd, ht), (ht, 0))
    bg = self.viewer.get_bg()
    pen = Pen(color=bg)
    brush = Brush(color=bg, fill=True)
    self.rl = [(POLYGON, cpoints, pen, brush)]