snake.py

from turtle import Turtle
STARTING_POSITIONS = [(0, 0), (-20, 0), (-40, 0)]
MOVE_DISTANCE = 20
UP = 90
DOWN = 270
LEFT = 180
RIGHT = 0
class Snake:
def init(self):
self.segments = []
self.create_snake()
self.head = self.segments[0]
def create_snake(self):
    for position in STARTING_POSITIONS:
        self.add_segment(position)

def add_segment(self, position):
    new_segment = Turtle("square")
    new_segment.color("white")
    new_segment.penup()
    new_segment.goto(position)
    self.segments.append(new_segment)

def extend(self):
    self.add_segment(self.segments[-1].position())

def move(self):
    for seg_num in range(len(self.segments) - 1, 0, -1):
        new_x = self.segments[seg_num - 1].xcor()
        new_y = self.segments[seg_num - 1].ycor()
        self.segments[seg_num].goto(new_x, new_y)
    self.head.forward(MOVE_DISTANCE)

def up(self):
    if self.head.heading() != DOWN:
        self.head.setheading(UP)

def down(self):
    if self.head.heading() != UP:
        self.head.setheading(DOWN)

def left(self):
    if self.head.heading() != RIGHT:
        self.head.setheading(LEFT)

def right(self):
    if self.head.heading() != LEFT:
        self.head.setheading(RIGHT)</code></pre><h2>food.py</h2><pre><code class="lang-python">from turtle import Turtle

import random
class Food(Turtle):
def init(self):
super().init()
self.shape("circle")
self.penup()
self.shapesize(stretch_len=0.5, stretch_wid=0.5)
self.color("blue")
self.speed("fastest")
self.refresh()
def refresh(self):
    random_x = random.randint(-280, 280)
    random_y = random.randint(-280, 280)
    self.goto(random_x, random_y)</code></pre><h2>scoreboard.py</h2><pre><code class="lang-python">from turtle import Turtle

ALIGNMENT = "center"
FONT = ("Courier", 24, "normal")
class Scoreboard(Turtle):
def init(self):
super().init()
self.score = 0
with open("data.txt") as data:
self.high_score = int(data.read())
self.color("white")
self.penup()
self.goto(0, 270)
self.hideturtle()
self.update_scoreboard()
def update_scoreboard(self):
    self.clear()
    self.write(f&quot;Score: {self.score} High Score: {self.high_score}&quot;, align=ALIGNMENT, font=FONT)

def reset(self):
    if self.score &gt; self.high_score:
        self.high_score = self.score
        with open(&quot;data.txt&quot;, mode=&quot;w&quot;) as data:
            data.write(f&quot;{self.high_score}&quot;)
    self.score = 0
    self.update_scoreboard()

def increase_score(self):
    self.score += 1
    self.update_scoreboard()

def game_over(self):
    self.goto(0, 0)
    self.write(&quot;GAME OVER&quot;, align=ALIGNMENT, font=FONT)
    self.reset()</code></pre><h2>main.py</h2><pre><code class="lang-python">from turtle import Screen

from snake import Snake
from food import Food
from scoreboard import Scoreboard
import time
screen = Screen()
screen.setup(width=600, height=600)
screen.bgcolor("black")
screen.title("My Snake Game")
screen.tracer(0)
snake = Snake()
food = Food()
scoreboard = Scoreboard()
screen.listen()
screen.onkey(snake.up, "Up")
screen.onkey(snake.down, "Down")
screen.onkey(snake.left, "Left")
screen.onkey(snake.right, "Right")
game_is_on = True
while game_is_on:
screen.update()
time.sleep(0.1)
snake.move()
# Detect collision with food.
if snake.head.distance(food) &lt; 15:
    food.refresh()
    snake.extend()
    scoreboard.increase_score()

# Detect collision with wall.
if snake.head.xcor() &gt; 280 or snake.head.xcor() &lt; -280 or snake.head.ycor() &gt; 280 or snake.head.ycor() &lt; -280:
    game_is_on = False
    scoreboard.game_over()

# Detect collision with tail.
for segment in snake.segments:
    if segment == snake.head:
        pass
    elif snake.head.distance(segment) &lt; 10:
        game_is_on = False
        scoreboard.game_over()

screen.exitonclick()

data.txt

0