The Game of Life
An ASCII version of Conway's Game of Life made in python.
There are some slight flaws in the rules of the game due to the outer boundary of the grid where I print the cells, but it is more or less the Game of Life.
I would also stay away from making your own pattern of cells since it's non-visual and basically the definition of non user-friendly. Also, there's limited input validation so be careful when inputting... sorry, I'm a little lazy.
If you do want to be able to make your own patterns perhaps go and check out @Emlyn908 's version here: https://replit.com/talk/share/Conways-Game-of-Life/145186
It has quite a nifty cursor-style input.
If your display isn't large enough to be able to view the entire grid, it may look messed up as it will be split over multiple lines. You can always fork it if you want to.
Hope you enjoy it as much as I do!