code: def fill(self, rgb, x=0, y=0, w=None, h=None, name=""):
      
           
      
          if w == None: w = self.w - x
          if h == None: h = self.h - y
          img = Image.new("RGBA", (w,h), rgb)
          self.layer(img, x, y, name)
docs: Creates a new fill layer.
      
          Creates a new layer filled with the given rgb color.
          For example, fill((255,0,0)) creates a red fill.
          The layers fills the entire canvas by default.