def showTransformer(self):
        """ Let the user pick transformations: Bounce, Repeat, Reverse """
        self.clearStatusLine()
        prompting = True
        while prompting:
            self.promptPrint("[B]ounce, [R]epeat, or Re[v]erse?")
            c = self.stdscr.getch()
            if c in [98]:  # b - bounce |> -> |><|
                prompting = False
                self.transform_bounce()
            if c in [114]:  # r - repeat |> -> |>|>
                prompting = False
                self.transform_repeat()
            if c in [118]:  # v - reverse |> -> <|
                prompting = False
                self.transform_reverse()
            if c in [27]: # escape - cancel
                prompting = False
 Let the user pick transformations: Bounce, Repeat, Reverse 
durdraw/durdraw_ui_curses.py