'Fill Rectangle.'

def rectangle(self, rect, attr=None, fill='    '):

    pass
    oldtop = self.WindowTop
    oldpos = self.pos()
    (x0, y0, x1, y1) = rect
    if (attr is None):
        attr = self.attr
    if fill:
        rowfill = (fill[:1] * abs((x1 - x0)))
    else:
        rowfill = ('    ' * abs((x1 - x0)))
    for y in range(y0, y1):
        System.Console.SetCursorPosition(x0, y)
        self.write_color(rowfill, attr)
    self.pos(*oldpos)
