note jkahn Seems like the <code>method display</code> as written would actually print all the cells in one row -- <code>method iterate</code> doesn't have an explicit hook for "reached end of line". That's fine, since we have <code>$.max</code> available within the object. <p>I think <code>method display</code> should actually look like this: <code> method display { iterate { print $.grid[$^x][$^y] ?? '+' :: '.'; print "\n" if ($^x == $.max); # print each row on own line } print "\n"; # blank line follows grid print "Turn $(++$.count), press enter to continue" print " or ctl-c to quit"; <$*IN>; .calculate(); } # end method display </code> <p> A separate style comment: wouldn't it be a bit cleaner to remove the <code>.calculate();</code> line from <code>method display</code> and change the <code>loop</code> at the top so that it reads: <code> loop { $life.display(); $life.calculate(); } </code> Then there's no nasty surprise when someone does: <code> # somewhere far, far, away $life.display; `shell-script;clear`; # weird stuff on screen tty $life.display; # refresh terminal *only* </code> later. I recognize that's personal preference, but Side Effects Are Scary. 253366 253438