How to make a Snake game using Python..

 

import turtle

import time

import random

delay=0.1

# set up the screem

win= turtle.Screen()

win.title("Snake Game By Sumit Sarkar  ")

win.bgcolor("green")

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

win.tracer(0)

#snake head

head=turtle.Turtle()

head.speed(0)

head.shape("square")

head.color("black")

head.penup()

head.goto(0,0)

head.direction="stop"

#Snake food

food=turtle.Turtle()

food.speed(0)

food.shape("circle")

food.color("red")

food.penup()

food.goto(0,100)

segments= []

#functions

def go_up():

    if head.direction!="down":

        head.direction ="up"

def go_down():

    if head.direction!="up":

        head.direction="down"

def go_right():

    if head.direction!="left":

        head.direction="right"

def go_left():

    if head.direction!="right":

        head.direction="left"

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)

    

#keyboard binding

win.listen()

  

win.onkeypress(go_up,"w")   

win.onkeyrelease(go_down,"s")

win.onkeypress(go_left,"a")

win.onkeypress(go_right,"d")

#maingameloop

while True:

    win.update()

    #chack for collision with the border

    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'

        #hide the segment

        for segment in segments:

            segment.goto(1000,1000)

        #clear the segments

        segments.clear()

    # chack for a collision with the food

    if head.distance(food)<20:

        #move the food to a random spot

        x=random.randint(-290, 290)

        y= random.randint(-290, 290)

        food.goto(x,y)

        #add a segment

        new_segment=turtle.Turtle()

        new_segment.speed(0)

        new_segment.shape("square")

        new_segment.color("grey")

        new_segment.penup()

        segments.append(new_segment)

    # move the end segments first in reverse order

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

        x=segments[index-1].xcor()

        y=segments[index-1].ycor()

        segments[index].goto(x,y)

    # move segment 0 to where the head is

    if len(segments)>0:

        x=head.xcor()

        y=head.ycor()

        segments[0].goto(x,y)

    move()

    

    # check for head collision with the body segments

    for segment in segments:

        if segment.distance(head) < 20:

            time.sleep(1)

            head.goto(0,0)

            head.direction="stop"

            for segment in segments:

                segment.goto(1000, 1000)

            segments.clear()

   

    time.sleep(delay)

win.mainloop()