I rewrote the life2.py using a class in order to eliminate global
variable declarations, and some other things, such as bringing
freegames.util#square() instream to be independent of freegames,
carefully accounting for every pixel output, etc. 

Works a little better but alt-Q has no effect whatsoever and 
it is necessary to Force Quit (mac terminology) or to switch to
the shell window and quit that first. 

Once this bug is fixed, wherever that might be, you might look into
using mylife.py as an turtle example -- with whatever changes you
like -- because it is interesting to use and it exercises the turtle
and tkinter very strenuously. (just leave my name off it...)

Thanks for your hard work.