Игра змейка, яблоко исчезает, я не знаю почему. Помогите пожалуйста

from tkinter import *
from random import *

tk = Tk()
tk.title("Змійка")
tk.attributes("-topmost", True)
c = Canvas(tk, height=500, width=500, bg="black")
c.pack()

height = 500
width = 500
cell = 10
snake_x = 24
snake_y = 24
apple_x = randint(0, 49)
apple_y = randint(0, 49)
snake_pos_x = 0
snake_pos_y = 0
snake_size = 5
snake_coords = []
id_item = 0
apple_pos = []

def paint_snake_item(snake_x, snake_y, cell):
    global id_item
    snake = c.create_rectangle(snake_x*cell, snake_y*cell,
                       snake_x*cell+cell, snake_y*cell+cell,
                       fill="yellow", outline="yellow")
    id_item = id_item + 1
    snake_coords.append([snake_x, snake_y, id_item])
    print(snake_coords)

def paint_apple(apple_x, apple_y, cell):
    apple = c.create_rectangle(apple_x*cell, apple_y*cell,
                       apple_x*cell+cell, apple_y*cell+cell,
                       fill="red", outline='red')
    apple_pos.append([apple_x, apple_y])
    print(apple_pos)
    
def can_we_del_item():
    if len(snake_coords) >= snake_size:
        temp_item = snake_coords.pop(0)
        c.delete(temp_item[2])
        print(temp_item)
        
def snake_move(event):
    global snake_x
    global snake_y
    global snake_pos_x
    global snake_pos_y
    if event.keysym == "Up":
        snake_pos_x = 0
        snake_pos_y = -1
        can_we_del_item()
    if event.keysym == "Down":
        snake_pos_x = 0
        snake_pos_y = 1
        can_we_del_item()
    if event.keysym == "Left":
        snake_pos_x = -1
        snake_pos_y = 0
        can_we_del_item()
    if event.keysym == "Right":
        snake_pos_x = 1
        snake_pos_y = 0
        can_we_del_item()
    snake_x = snake_x + snake_pos_x
    snake_y = snake_y + snake_pos_y
    paint_snake_item(snake_x, snake_y, cell)
    #paint_apple(apple_x, apple_y, cell)

paint_apple(apple_x, apple_y, cell)
paint_snake_item(snake_x, snake_y, cell)

c.bind_all('<KeyPress-Up>', snake_move)
c.bind_all('<KeyPress-Down>', snake_move)
c.bind_all('<KeyPress-Left>', snake_move)
c.bind_all('<KeyPress-Right>', snake_move)