Update:Text revised - essentially the same idea, but propose a more reasonable implementation:

The population of the $back variable needs to be updated INSIDE sub "next_card".

In particular, 

#back display
  -message=>$value

[download]
for the $back variable must be set AFTER a new $value is obtained, inside "next_card".

     "As you get older three things happen. The first is your memory goes, and I can't remember the other two... " - Sir Norman Wisdom

In reply to Re: Tk::MsgBox and my -message string by NetWallah
in thread Tk::MsgBox and my -message string by davidov0009

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