import turtle

import random

w = 500

h = 500

food_size = 10

delay = 100

offsets = {

    "up": (0, 20),

    "down": (0, -20),

    "left": (-20, 0),

    "right": (20, 0)

}

def reset():

    global snake, snake_dir, food_position, pen

    snake = [[0, 0], [0, 20], [0, 40], [0, 60], [0, 80]]

    snake_dir = "up"

    food_position = get_random_food_position()

    food.goto(food_position)

    move_snake()

def move_snake():

    global snake_dir

    new_head = snake[-1].copy()

    new_head[0] = snake[-1][0] + offsets[snake_dir][0]

    new_head[1] = snake[-1][1] + offsets[snake_dir][1]

    if new_head in snake[:-1]:

        reset()

    else:

        snake.append(new_head)

        if not food_collision():

            snake.pop(0)

        if snake[-1][0] > w / 2:

            snake[-1][0] -= w

        elif snake[-1][0] < - w / 2:

            snake[-1][0] += w

        elif snake[-1][1] > h / 2:

            snake[-1][1] -= h

        elif snake[-1][1] < -h / 2:

            snake[-1][1] += h

        pen.clearstamps()

        for segment in snake:

            pen.goto(segment[0], segment[1])

            pen.stamp()

        screen.update()

        turtle.ontimer(move_snake, delay)

def food_collision():

    global food_position

    if get_distance(snake[-1], food_position) < 20:

        food_position = get_random_food_position()

        food.goto(food_position)

        return True

    return False

def get_random_food_position():

    x = random.randint(- w / 2 + food_size, w / 2 - food_size)

    y = random.randint(- h / 2 + food_size, h / 2 - food_size)

    return (x, y)

def get_distance(pos1, pos2):

    x1, y1 = pos1

    x2, y2 = pos2

    distance = ((y2 - y1) ** 2 + (x2 - x1) ** 2) ** 0.5

    return distance

def go_up():

    global snake_dir

    if snake_dir != "down":

        snake_dir = "up"

def go_right():

    global snake_dir

    if snake_dir != "left":

        snake_dir = "right"

def go_down():

    global snake_dir

    if snake_dir!= "up":

        snake_dir = "down"

def go_left():

    global snake_dir

    if snake_dir != "right":

        snake_dir = "left"

screen = turtle.Screen()

screen.setup(w, h)

screen.title("Snake")

screen.bgcolor("blue")

screen.setup(500, 500)

screen.tracer(0)

pen = turtle.Turtle("square")

pen.penup()

food = turtle.Turtle()

food.shape("square")

food.color("yellow")

food.shapesize(food_size / 20)

food.penup()

screen.listen()

screen.onkey(go_up, "Up")

screen.onkey(go_right, "Right")

screen.onkey(go_down, "Down")

screen.onkey(go_left, "Left")

reset()

turtle.done()

​

# import required modules

import turtle

import time

import random

delay = 0.1

score = 0

high_score = 0

# Creating a window screen

wn = turtle.Screen()

wn.title("Snake Game")

wn.bgcolor("blue")

# the width and height can be put as user's choice

wn.setup(width=600, height=600)

wn.tracer(0)

# head of the snake

head = turtle.Turtle()

head.shape("square")

head.color("white")

head.penup()

head.goto(0, 0)

head.direction = "Stop"

# food in the game

food = turtle.Turtle()

colors = random.choice(['red', 'green', 'black'])

shapes = random.choice(['square', 'triangle', 'circle'])

food.speed(0)

food.shape(shapes)

food.color(colors)

food.penup()

food.goto(0, 100)

pen = turtle.Turtle()

pen.speed(0)

pen.shape("square")

pen.color("white")

pen.penup()

pen.hideturtle()

pen.goto(0, 250)

pen.write("Score : 0  High Score : 0", align="center",

          font=("candara", 24, "bold"))

# assigning key directions

def group():

    if head.direction != "down":

        head.direction = "up"

def godown():

    if head.direction != "up":

        head.direction = "down"

def goleft():

    if head.direction != "right":

        head.direction = "left"

def goright():

    if head.direction != "left":

        head.direction = "right"

def move():

    if head.direction == "up":

        y = head.ycor()

        head.sety(y+20)

    if head.direction == "down":

        y = head.ycor()

        head.sety(y-20)

    if head.direction == "left":

        x = head.xcor()

        head.setx(x-20)

    if head.direction == "right":

        x = head.xcor()

        head.setx(x+20)

wn.listen()

wn.onkeypress(group, "w")

wn.onkeypress(godown, "s")

wn.onkeypress(goleft, "a")

wn.onkeypress(goright, "d")

segments = []

# Main Gameplay

while True:

    wn.update()

    if head.xcor() > 290 or head.xcor() < -290 or head.ycor() > 290 or head.ycor() < -290:

        time.sleep(1)

        head.goto(0, 0)

        head.direction = "Stop"

        colors = random.choice(['red', 'blue', 'green'])

        shapes = random.choice(['square', 'circle'])

        for segment in segments:

            segment.goto(1000, 1000)

        segments.clear()

        score = 0

        delay = 0.1

        pen.clear()

        pen.write("Score : {} High Score : {} ".format(

            score, high_score), align="center", font=("candara", 24, "bold"))

    if head.distance(food) < 20:

        x = random.randint(-270, 270)

        y = random.randint(-270, 270)

        food.goto(x, y)

        # Adding segment

        new_segment = turtle.Turtle()

        new_segment.speed(0)

        new_segment.shape("square")

        new_segment.color("orange")  # tail colour

        new_segment.penup()

        segments.append(new_segment)

        delay -= 0.001

        score += 10

        if score > high_score:

            high_score = score

        pen.clear()

        pen.write("Score : {} High Score : {} ".format(

            score, high_score), align="center", font=("candara", 24, "bold"))

    # Checking for head collisions with body segments

    for index in range(len(segments)-1, 0, -1):

        x = segments[index-1].xcor()

        y = segments[index-1].ycor()

        segments[index].goto(x, y)

    if len(segments) > 0:

        x = head.xcor()

        y = head.ycor()

        segments[0].goto(x, y)

    move()

    for segment in segments:

        if segment.distance(head) < 20:

            time.sleep(1)

            head.goto(0, 0)

            head.direction = "stop"

            colors = random.choice(['red', 'blue', 'green'])

            shapes = random.choice(['square', 'circle'])

            for segment in segments:

                segment.goto(1000, 1000)

            segment.clear()

            score = 0

            delay = 0.1

            pen.clear()

            pen.write("Score : {} High Score : {} ".format(

                score, high_score), align="center", font=("candara", 24, "bold"))

    time.sleep(delay)

wn.mainloop()