## @package snake_game
#  @brief Snake game from Udemy's 100 Days of Code (day 21).
#
#  @mainpage Snake Game
#
#  A snake of three square segments moves across a Python turtle screen by
#  itself and is steered with the arrow keys. It eats food, grows and keeps a
#  score, and the game is over when the head passes the wall or touches the
#  tail. The game uses the standard library only.
#
#  The constants of the game are in constants.py.

"""Snake game from Udemy's 100 Days of Code (day 21)."""