# Disclaimer: this code is not complete, it is just an example

class Snake:
	def __init__(self):
		self.segments = []
		self.last_direction = "UP"
		self.current_head = (10, 10)
		self.size = 3

	def move(direction = None):
		if direction is None: direction = self.last_direction
		if self.current_head == food.location:
			food.eat()
			self.size += 1
		# Draw the new segment, remove the old segment,
		# change self.segments as required
		self.last_direction = direction

class Food:
	def __init__(self):
		self.location = (5, 5)

	def eat():
		# change location, remove drawing, draw new
		# location on the board
		pass