Как удлинять змейку после поедания "яблока"?

import pygame as pg,random,time
import pygame
 
def close_game():
    for i in pygame.event.get():
        if i.type == pygame.QUIT:
            quit()
 
def apple():
    global apple_x, apple_y
    while apple_x % 25 != 0 or apple_y % 25 != 0:
        apple_x = random.randint(25, 575)
        apple_y = random.randint(25, 575)
    pygame.draw.rect(display, (255, 0, 0), (apple_x, apple_y, 25, 25))
 
def move():
    global user_x, user_y, mx, my
    key = pygame.key.get_pressed()
    if key[pygame.K_RIGHT]:
        mx, my = 1, 0
    if key[pygame.K_LEFT]:
        mx, my = -1, 0
    if key[pygame.K_UP]:
        mx, my = 0, -1
    if key[pygame.K_DOWN]:
        mx, my = 0, 1
    user_x += mx * 25
    user_y += my * 25
 
def eat():
    global user_x, user_y, apple_x, apple_y
    if (user_x == apple_x) and (user_y == apple_y):
        apple_y = 1
        apple_x = 1
 
resolution_w, resolution_h = 600, 600 #разрешение на оси х и оси у
display = pygame.display.set_mode((resolution_w,resolution_h))
user_w, user_h, user_x, user_y = 25, 25, resolution_w -500, resolution_h / 2 #параметры пользователя
mx, my = 0, 0
clock = pg.time.Clock()
FPS = 30
apple_x = random.randint(0,600)
apple_y = random.randint(0,600)
snake = []
pygame.display.set_caption(("Пажилой питон"))
 
while True:
    display.fill((0, 0, 0))
    clock.tick(FPS)
    apple()
    move()
    eat()
    pygame.draw.rect(display, (0,255,0), (user_x, user_y, user_w, user_h))
    if user_x > 600 or user_x < -25 or user_y > 600 or user_y < -25:
        break
    pygame.display.flip()
    clock.tick(FPS)
    close_game()

import pygame
from random import randrange
 
RES = 800
SIZE = 50
 
x, y = randrange(0, RES, SIZE), randrange(0, RES, SIZE)
apple = randrange(0, RES, SIZE), randrange(0, RES, SIZE)
dirs = {'W': True, 'S': True, 'A': True, 'D': True}
length = 1
score = 0
snake = [(x, y)]
dx, dy = 0, 0
fps = 5
 
pygame.init()
sc = pygame.display.set_mode([RES, RES])
clock = pygame.time.Clock()
font_score = pygame.font.SysFont('Arial', 26, bold=True)
font_end = pygame.font.SysFont('Arial', 66, bold=True)
 
 
while True:
    sc.fill(pygame.Color('black'))
    # рисуем змейку, ЯБЛОКО
    [(pygame.draw.rect(sc, pygame.Color('green'), (i, j, SIZE - 2, SIZE - 2))) for i, j in snake]
    pygame.draw.rect(sc, pygame.Color('red'), (*apple, SIZE, SIZE))
    #показать очки
    render_score = font_score.render(f'SCORE:{score}', 1, pygame.Color('orange'))
    sc.blit(render_score, (5, 5))
    # движение змейки
    x += dx * SIZE
    y += dy * SIZE
    snake.append((x, y))
    snake = snake[-length:]
    # поедания яблока
    if snake[-1] == apple:
        apple = randrange(0, RES, SIZE), randrange(0, RES, SIZE)
        length += 1
        fps += 1
        score += 1
    # выход за границу
    if x < 0 or x > RES - SIZE or y < 0 or y > RES - SIZE or len(snake) != len(set(snake)):
        while True:
            render_end = font_end.render('GAME OVER', 1, pygame.Color('orange'))
            sc.blit(render_end, (RES // 2 - 200, RES // 3))
            pygame.display.flip()
            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    exit()
 
 
    pygame.display.flip()
    clock.tick(fps)
 
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            exit()
 
    key = pygame.key.get_pressed()
    if key[pygame.K_w] and dirs['W']:
        dx, dy = 0, -1
        dirs = {'W': True, 'S': False, 'A': True, 'D': True}
    if key[pygame.K_s] and dirs['S']:
        dx, dy = 0, 1
        dirs = {'W': False, 'S': True, 'A': True, 'D': True}
    if key[pygame.K_a] and dirs['A']:
        dx, dy = -1, 0
        dirs = {'W': True, 'S': True, 'A': True, 'D': False}
    if key[pygame.K_d] and dirs['D']:
        dx, dy = 1, 0
        dirs = {'W': True, 'S': True, 'A': False, 'D': True}