> write me a simple snake game.
Sure, here is a simple version of the snake game in Python using the Pygame library. Make sure you have Pygame installed (`pip install pygame`) before running the script.

```python
import pygame
import time
import random

pygame.init()

# Set up display
width, height = 800, 600
screen = pygame.display.set_mode((width, height))
pygame.display.set_caption('Snake Game')

# Define colors
white = (255, 255, 255)
yellow = (255, 255, 102)
black = (0, 0, 0)
red = (255, 0, 0)
green = (0, 255, 0)
blue = (0, 0, 255)

# Define snake block size
snake_block = 10

# Define speed of the snake
snake_speed = 15

# Initialize the snake
snake_List = []
length_of_snake = 1

# Set up the font
font_style = pygame.font.SysFont(None, 50)
score_font = pygame.font.SysFont(None, 35)

def our_snake(snake_block, snake_List):
    for x in snake_List:
        pygame.draw.rect(screen, black, [x[0], x[1], snake_block, snake_block])

def message(msg, color):
    mesg = font_style.render(msg, True, color)
    screen.blit(mesg, [width / 6, height / 3])

def gameLoop():
    game_over = False
    game_close = False

    x1 = width / 2
    y1 = height / 2

    x1_change = 0
    y1_change = 0

    snake_List = []
    length_of_snake = 1

    foodx = round(random.randrange(0, width - snake_block) / 10.0) * 10.0
    foody = round(random.randrange(0, height - snake_block) / 10.0) * 10.0

    while not game_over:

        while game_close:
            screen.fill(blue)
            message("You Lost! Press Q-Quit or C-Play Again", red)
            pygame.display.update()

            for event in pygame.event.get():
                if event.type == pygame.KEYDOWN:
                    if event.key == pygame.K_q:
                        game_over = True
                        game_close = False
                    if event.key == pygame.K_c:
                        gameLoop()

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                game_over = True
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_LEFT:
                    x1_change = -snake_block
                    y1_change = 0
                elif event.key == pygame.K_RIGHT:
                    x1_change = snake_block
                    y1_change = 0
                elif event.key == pygame.K_UP:
                    y1_change = -snake_block
                    x1_change = 0
                elif event.key == pygame.K_DOWN:
                    y1_change = snake_block
                    x1_change = 0

        if x1 >= width or x1 < 0 or y1 >= height or y1 < 0:
            game_close = True
        x1 += x1_change
        y1 += y1_change
        screen.fill(blue)
        pygame.draw.rect(screen, green, [foodx, foody, snake_block, snake_block])
        snake_Head = []
        snake_Head.append(x1)
        snake_Head.append(y1)
        snake_List.append(snake_Head)
        if len(snake_List) > length_of_snake:
            del snake_List[0]

        for x in snake_List[:-1]:
            if x == snake_Head:
                game_close = True

        our_snake(snake_block, snake_List)

        pygame.display.update()

        if x1 == foodx and y1 == foody:
            foodx = round(random.randrange(0, width - snake_block) / 10.0) * 10.0
            foody = round(random.randrange(0, height - snake_block) / 10.0) * 10.0
            length_of_snake += 1

        time.sleep(snake_speed)

    pygame.quit()
    quit()

gameLoop()
```

This code creates a simple snake game. The snake grows and moves around the screen, eating the food that appears randomly. The game ends if the snake runs into the wall or itself. The score is displayed at the top of the screen.