Implement the following architecture: ([['write a snake game in 3D & run it', 'Certainly! Below is an example of a simple 3D Snake game written in Python using the **Ursina Engine**, which is a game engine for Python that makes it easy to create games quickly.<br/><br/>First, make sure you have Python installed on your system (preferably Python 3.6 or later). You will also need to install the `ursina` package. You can install it using pip:<br/><pre><code class="bash"><br/>pip install ursina</code></pre><br/><br/>Now, here\'s the code for the 3D Snake game:<br/><pre><code class="python"><br/>from ursina import *<br/>from random import randint<br/><br/>app = Ursina()<br/><br/>window.title = \'3D Snake Game\'<br/>window.borderless = False<br/>window.fullscreen = False<br/>window.exit_button.visible = False<br/>window.fps_counter.enabled = True<br/><br/>camera.position = (0, 15, -26)<br/>camera.rotation_x = 35<br/><br/># Create the ground<br/>ground = Entity(model=\'cube\', color=color.light_gray, scale=(20, 1, 20), position=(0, -0.5, 0))<br/><br/># Snake initial settings<br/>snake = []<br/>initial_length = 3<br/>for i in range(initial_length):<br/>    segment = Entity(model=\'cube\', color=color.green, scale=(1, 1, 1), position=(i, 0, 0))<br/>    snake.append(segment)<br/><br/>direction = Vec3(1, 0, 0)  # Start moving along x-axis<br/><br/># Generate initial food<br/>food = Entity(model=\'cube\', color=color.red, scale=(1, 1, 1), position=(randint(-9,9), 0, randint(-9,9)))<br/><br/>def update():<br/>    global direction<br/><br/>    # Snake movement<br/>    if held_keys[\'up arrow\']:<br/>        if direction != Vec3(0, 0, 1):<br/>            direction = Vec3(0, 0, -1)<br/>    elif held_keys[\'down arrow\']:<br/>        if direction != Vec3(0, 0, -1):<br/>            direction = Vec3(0, 0, 1)<br/>    elif held_keys[\'left arrow\']:<br/>        if direction != Vec3(1, 0, 0):<br/>            direction = Vec3(-1, 0, 0)<br/>    elif held_keys[\'right arrow\']:<br/>        if direction != Vec3(-1, 0, 0):<br/>            direction = Vec3(1, 0, 0)<br/><br/>    move_snake()<br/><br/>def move_snake():<br/>    # Update positions of snake segments<br/>    for i in range(len(snake)-1, 0, -1):<br/>        snake[i].position = snake[i-1].position<br/><br/>    # Move the head<br/>    snake[0].position += direction<br/><br/>    # Check for collisions with walls<br/>    if abs(snake[0].x) &gt; 10 or abs(snake[0].z) &gt; 10:<br/>        destroy(snake[0])<br/>        invoke(Func(game_over), delay=0.1)<br/>        return<br/><br/>    # Check for collisions with self<br/>    for segment in snake[1:]:<br/>        if snake[0].position == segment.position:<br/>            invoke(Func(game_over), delay=0.1)<br/>            return<br/><br/>    # Check for collisions with food<br/>    if snake[0].position == food.position:<br/>        extend_snake()<br/>        relocate_food()<br/><br/>def extend_snake():<br/>    # Add new segment to the snake<br/>    new_segment = Entity(model=\'cube\', color=color.green, scale=(1, 1, 1))<br/>    new_segment.position = snake[-1].position<br/>    snake.append(new_segment)<br/><br/>def relocate_food():<br/>    # Move the food to a new random position<br/>    food.position = (randint(-9,9), 0, randint(-9,9))<br/>    # Ensure food doesn\'t spawn on the snake<br/>    for segment in snake:<br/>        if food.position == segment.position:<br/>            relocate_food()<br/>            break<br/><br/>def game_over():<br/>    print("Game Over!")<br/>    application.quit()<br/><br/># Set up the game loop to update at regular intervals<br/>from ursina import time<br/>time_interval = 0.2<br/>held_keys = {}  # Initialize held_keys to prevent KeyError<br/><br/>def game_loop():<br/>    update()<br/>    invoke(game_loop, delay=time_interval)<br/><br/>game_loop()<br/><br/>app.run()</code></pre><br/><br/>**Instructions to Run the Game:**<br/><br/>1. **Save the Code:** Copy the code above into a file and save it with a `.py` extension, for example, `snake3d.py`.<br/><br/>2. **Install Ursina:** If you haven\'t installed Ursina yet, open your terminal or command prompt and run:<pre><code class="```bash"><br/>   pip install ursina<pre><code class="```"><br/><br/>3. **Run the Game:** In the terminal, navigate to the directory where you saved `snake3d.py` and run:<pre><code class="```bash"><br/>   python snake3d.py<pre><code class="```"><br/><br/>**How to Play:**<br/><br/>- Use the **arrow keys** to change the direction of the snake:<br/>  - **Up Arrow:** Move forward (in negative Z direction)<br/>  - **Down Arrow:** Move backward (in positive Z direction)<br/>  - **Left Arrow:** Move left (in negative X direction)<br/>  - **Right Arrow:** Move right (in positive X direction)<br/>- The goal is to eat the red food cubes. Each time the snake eats the food, it grows longer.<br/>- Avoid colliding with the walls or with the snake\'s own body, or the game will end.<br/><br/>**Game Features:**<br/><br/>- Simple 3D environment with a controllable snake.<br/>- The snake grows longer each time it eats food.<br/>- Randomly placed food that repositions after being eaten.<br/>- Collision detection with walls and self.<br/>- Game over condition handling.<br/><br/>**Customization:**<br/><br/>You can adjust various aspects of the game by modifying the code:<br/><br/>- **Speed:** Change the `time_interval` variable to make the snake move faster or slower.<br/>- **Grid Size:** Modify the range in `randint(-9,9)` to change the size of the playing field.<br/>- **Snake Appearance:** Change the `color` or `model` properties when creating snake segments for different visuals.<br/><br/>**Dependencies:**<br/><br/>- **Python 3.6 or later**<br/>- **Ursina Engine**<br/><br/>**Note:**<br/><br/>- This is a basic implementation intended to demonstrate how a 3D snake game can be created using Python and Ursina. There’s plenty of room for enhancements, such as adding scoring, levels, sound effects, or more sophisticated graphics.<br/><br/>Feel free to ask if you have any questions or need further assistance with the code!']], 1, '<Response [200]>', {'interactive': True, '__type__': 'update'})