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  1. or download this
     method display
      {
    ...
        <$*IN>;
        .calculate();
      } # end method display
    
  2. or download this
    loop { $life.display(); $life.calculate(); }
    
  3. or download this
      # somewhere far, far, away
      $life.display;
      `shell-script;clear`; # weird stuff on screen tty
      $life.display; # refresh terminal *only*