Made the game never end

[DefiantPro]

I added some code to line 111 of the program to make the snake bounce of the walls and never die
import turtle
import time
import random

delay = 0.3

Score

score = 0
high_score = 0

Set up the screen

wn = turtle.Screen()
wn.title("Snake Game by @TokyoEdTech")
wn.bgcolor("green")
wn.setup(width=600, height=600)
wn.tracer(0) # Turns off the screen updates

Snake head

head = turtle.Turtle()
head.speed(0)
head.shape("square")
head.color("blue")
head.penup()
head.goto(0, 0)
head.direction = "stop"

Snake food

food = turtle.Turtle()
food.speed(0)
food.shape("circle")
food.color("orange")
food.penup()
food.goto(0, 100)

segments = []

Pen

pen = turtle.Turtle()
pen.speed(0)
pen.shape("square")
pen.color("blue")
pen.penup()
pen.hideturtle()
pen.goto(0, 260)
pen.write("Score: 0 High Score: 0", align="center", font=("Courier", 24, "normal"))

Functions

def go_up():
if head.direction != "down":
head.direction = "up"

def go_down():
if head.direction != "up":
head.direction = "down"

def go_left():
if head.direction != "right":
head.direction = "left"

def go_right():
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)

Keyboard bindings

wn.listen()
wn.onkeypress(go_up, "q")
wn.onkeypress(go_down, "a")
wn.onkeypress(go_left, "w")
wn.onkeypress(go_right, "g")

Main game loop

while True:
wn.update()

# Check 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("circle")
    new_segment.color("red")
    new_segment.penup()
    segments.append(new_segment)

    # Shorten the delay
    delay -= 0.001

    # Increase the score
    score += 10

    if score > high_score:
        high_score = score

    pen.clear()
    pen.write("Score: {}  High Score: {}".format(score, high_score), align="center", font=("Courier", 24, "normal"))

# 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:
        # Reset the delay
        delay = 0.1