11-8-21: Ideas for future improvement
1. Computer should detect who wins.
2. User Interface - manage the game like congratulations and next moves.
3. Costumes/Backgrounds
4. Scoreboard
5. Computer player
11-17-21: Fixed bug related to playing squares that have already been played.
11-19-21: Game now detects wins and ties, and it stops the game when this occurs.
We need to look for repetitive code to find oppurtunities for 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