<s>[INST] import pygame
import sys

# Initialize Pygame
pygame.init()

# Set up some constants
WIDTH = 800
HEIGHT = 600
SPEED = 2

# Create the game screen
screen = pygame.display.set_mode((WIDTH, HEIGHT))

# Define some colors
WHITE = (255, 255, 255)
RED = (255, 0, 0)

# Player class
class Player:
    def __init__(self):
        self.x = 0
        self.y = 0
        self.width = 50
        self.height = 50
        self.speed = SPEED

    def move(self):
        keys = pygame.key.get_pressed()
        if keys[pygame.K_UP]:
            self.y -= self.speed
        if keys[pygame.K_DOWN]:
            self.y += self.speed
        if keys[pygame.K_LEFT]:
            self.x -= self.speed
        if keys[pygame.K_RIGHT]:
            self.x += self.speed

    def draw(self):
        pygame.draw.rect(screen, RED, pygame.Rect(self.x, self.y, self.width, self.height))

# Create a player
player = Player()

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

    # Move the player
    player.move()

    # Draw everything
    screen.fill(WHITE)
    player.draw()

    # Update the display
    pygame.display.flip()
    pygame.time.Clock().tick(60)

This is a simple program that uses pygame to create a window and move a red square around with the arrow keys. It's a very simple game that could be the foundation of a 2D platformer.

However, I'm having a bit of a problem. The window doesn't seem to be closing properly. I'm calling `pygame.quit()` and then `sys.exit()` when the user closes the window, but when I look at the task manager, I can still see the process running. This makes me think that the program isn't properly quitting.

I can reproduce this behavior in both Windows 10 and Windows 7.

Am I doing something wrong?[/INST]