import pygame, sys


class Crosshair(pygame.sprite.Sprite):
    def __init__(self, picture_path):
        super().__init__()
        self.image = pygame.image.load(picture_path)
        self.rect = self.image.get_rect()
    def update(self):
        self.rect.center = pygame.mouse.get_pos()


pygame.init()
clock = pygame.time.Clock()


screen_width = 1200
screen_height = 800
screen = pygame.display.set_mode((screen_width, screen_height))
background = pygame.image.load("bg_blue.png")
pygame.mouse.set_visible(False)


crosshair = Crosshair("crosshair.png")
crosshair_group = pygame.sprite.Group()
crosshair_group.add(crosshair)

while True :
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

    pygame.display.flip()
    screen.blit(background,(0,0))
    crosshair_group.draw(screen)
    crosshair_group.update()
    clock.tick(60)