Untitled

import pygame, sys, random
from pygame.math import Vector2

pygame.mixer.pre_init(44100, -16, 2, 512)
pygame.init()
cell_size = 40
cell_number = 20
screen = pygame.display.set_mode((cell_number * cell_size,cell_number * cell_size))
clock = pygame.time.Clock()
apple = pygame.image.load('Graphics/apple.png').convert_alpha()
game_font = pygame.font.Font('Font/PoetsenOne-Regular.ttf', 25)

SCREEN_UPDATE = pygame.USEREVENT
pygame.time.set_timer(SCREEN_UPDATE, 150)

class SNAKE:
    def __init__(self): #initialiser
        self.body = [Vector2(5, 10), Vector2(4, 10), Vector2(3, 10)]
        self.direction = Vector2(0,0)
        self.new_block = False
        
        self.head_up = pygame.image.load('Graphics/head_up.png').convert_alpha()
        self.head_down = pygame.image.load('Graphics/head_down.png').convert_alpha()
        self.head_right = pygame.image.load('Graphics/head_right.png').convert_alpha()
        self.head_left = pygame.image.load('Graphics/head_left.png').convert_alpha()
        
        self.tail_up = pygame.image.load('Graphics/tail_up.png').convert_alpha()
        self.tail_down = pygame.image.load('Graphics/tail_down.png').convert_alpha()
        self.tail_right = pygame.image.load('Graphics/tail_right.png').convert_alpha()
        self.tail_left = pygame.image.load('Graphics/tail_left.png').convert_alpha()
        
        self.body_tr = pygame.image.load('Graphics/body_tr.png').convert_alpha()
        self.body_tl = pygame.image.load('Graphics/body_tl.png').convert_alpha()
        self.body_bl = pygame.image.load('Graphics/body_bl.png').convert_alpha()
        self.body_br = pygame.image.load('Graphics/body_br.png').convert_alpha()
        
        self.body_vertical = pygame.image.load('Graphics/body_vertical.png').convert_alpha()
        self.body_horizontal = pygame.image.load('Graphics/body_horizontal.png').convert_alpha()
        
        #class - blueprint(plan) 
        #objects - something you create from your class
  

class MAIN:
    def __init__(self):
        self.snake = SNAKE()
   
main_game = MAIN()  #object

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()
    screen.fill((175, 215, 70))
    
    pygame.display.update()
    clock.tick(60)