    def reset(self):
        """
        Reset the widget to a blank screen.
        """
        self._canvas = Canvas(self._frame.canvas, self._h, self._w, x=self._x, y=self._y)
        self._cursor_x, self._cursor_y = 0, 0
        self._current_colours = (Screen.COLOUR_WHITE, Screen.A_NORMAL, Screen.COLOUR_BLACK)
Reset the widget to a blank screen.
samples/terminal.py