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## main.py
from turtle import Screen
from snake import Snake
from food import Food
from scoreboard import Scoreboard
import time

screen = Screen()
screen.setup(600,600)
screen.title("Snake Game 🐍")
screen.bgcolor("black")
screen.tracer(0) # Turning the animation off

snake = Snake()
food = Food()
scoreboard = Scoreboard()


screen.listen()

screen.onkeypress(fun=snake.up,key="Up")
screen.onkeypress(fun=snake.down,key="Down")
screen.onkeypress(fun=snake.left,key="Left")
screen.onkeypress(fun=snake.right,key="Right")
 

is_game_on = True
score = 0
while is_game_on:
    screen.update()
    time.sleep(0.1)
    snake.move()

    # Detect collision with food

    if snake.head.distance(food) < 15:
        food.refresh()
        scoreboard.score_update()
        snake.extend()

    # Detect collision with wall

    if snake.head.xcor() > 299 or snake.head.xcor() < -299 or\
          snake.head.ycor() > 299 or snake.head.ycor()<-299:
        scoreboard.game_over()
        is_game_on = False

screen.exitonclick()

## food.py
import random
from turtle import Turtle



class Food(Turtle):


    def __init__(self) -> None:
        super().__init__()
        self.shape("circle")
        self.penup()
        self.shapesize(stretch_len=0.5,stretch_wid=0.5)
        self.color("red")
        self.speed("fastest")
        self.refresh()

    def refresh(self):
        random_coordinates = ( random.randint(-280,280), random.randint(-280,280) )
        self.goto(random_coordinates)
        
# scoreboard.py

from turtle import Turtle
ALIGNMENT = "center"
FONT_NAME = "Courier"
FONT_SIZE = 17
FONT_TYPE = "normal"

   
class Scoreboard(Turtle):
    score = 0

    def __init__(self):
        super().__init__()
        self.color("yellow")
        self.hideturtle()
        self.penup()
        self.teleport(0,275)
        self.write(arg="score = 0",move=False,align=ALIGNMENT,font=(FONT_NAME, FONT_SIZE, FONT_TYPE))
    
    def score_update(self,):
        self.score += 1
        self.clear()
        self.write(arg=f"score = {self.score}",move=False,align=ALIGNMENT,font=(FONT_NAME, FONT_SIZE, FONT_TYPE))
    
    def game_over(self):
        
        self.home()
        self.write(arg=f"GAME OVER",move=False,align=ALIGNMENT,font=(FONT_NAME, FONT_SIZE, FONT_TYPE))
      
# snake.py
from turtle import Turtle, Screen

MOVE_DISTANCE = 20
UP = 90
DOWN = 270
LEFT = 180
RIGHT = 0

class Snake:

    def __init__(self) -> None:
        self.segments = []
        self.create_snake()
        self.head = self.segments[0]
        

    def create_snake(self):
        self.x_cor = 0
        for i in range(3):
            self.add_segment(self.x_cor)
            self.x_cor -= 20

    def add_segment(self,position):
        segment = Turtle("square")
        segment.color("white")
        segment.penup()
        segment.speed("slowest")
        segment.teleport(x=position)
        self.segments.append(segment)
        
    def extend(self):
        self.add_segment(self.segments[-1].pos())

    def move(self):

        for seq_num in range(len(self.segments) -1, 0 ,-1):
            new_x = self.segments[seq_num - 1].xcor()
            new_y = self.segments[seq_num - 1].ycor()
            self.segments[seq_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)





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