Snake game by python code.

 

import turtle

import random

w = 500

h = 500

fs = 10

d = 100  # milliseconds

offsets = {

    "up": (0, 20),

    "down": (0, -20),

    "left": (-20, 0),

    "right": (20, 0)

}

def r():

    global saap, kata, khanaT, pen

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

    kata = "up"

    khanaT = nun()

    food.goto(khanaT)

    hall()

def hall():

    global kata

    new_head = saap[-1].copy()

    new_head[0] = saap[-1][0] + offsets[kata][0]

    new_head[1] = saap[-1][1] + offsets[kata][1]

    if new_head in saap[:-1]:  

        r()

    else:

        saap.append(new_head)

        if not khana():

            saap.pop(0)  

        if saap[-1][0] > w / 2:

            saap[-1][0] -= w

        elif saap[-1][0] < - w / 2:

            saap[-1][0] += w

        elif saap[-1][1] > h / 2:

            saap[-1][1] -= h

        elif saap[-1][1] < -h / 2:

            saap[-1][1] += h

        pen.clearstamps()

 #clears all the stamps

        for segment in saap:

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

            pen.stamp()

        screen.update()

 #updates the turtle.screen screen

        turtle.ontimer(hall, d)

def khana():

    global khanaT

    if dist(saap[-1], khanaT) < 20:

        khanaT = nun()

        food.goto(khanaT)

        return True

    return False

def nun():

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

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

    return (x, y)

def dist(poos1, poos2):

    x1, y1 = poos1

    x2, y2 = poos2

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

    return distance

def mathi():

    global kata

    if kata != "down":

        kata = "up"

def go_right():

    global kata

    if kata != "left":

        kata = "right"

def go_down():

    global kata

    if kata != "up":

        kata = "down"

def go_left():

    global kata

    if kata != "right":

        kata = "left"

screen = turtle.Screen()

screen.setup(w, h)

screen.title("saap")

screen.bgcolor("green")

screen.setup(500, 500)

screen.tracer(0)

pen = turtle.Turtle("square")

pen.penup()

food = turtle.Turtle()

food.shape("circle")

food.color("white")

food.shapesize(fs / 20) 

food.penup()

screen.listen()

screen.onkey(mathi, "Up")

screen.onkey(go_right, "Right")

screen.onkey(go_down, "Down")

screen.onkey(go_left, "Left")

r()

turtle.done()