How would you create a basic http web server using the flask library in python. Make sure this uses python 3 and is set up to be a template so that I can add multiple pages to the site later on.
Hello! Here is an example of a basic python 3 http web server template that uses the flask library. In this example we will be creating a file named `app.py` a folder named `WebApp`.

```python
from flask import Flask, render_template

app = Flask(__name__)

@app.route('/')
def index():
    return render_template('index.html')

if __name__ == '__main__':
    app.run(debug=True)
```

After creating the WebApp folder, app.py file, and then placing the code inside, create a folder named `templates` inside the `WebApp` folder, then create a file called `index.html`.

```html
<!DOCTYPE html>
<html lang=en>
<head>
    <meta charset=UTF-8>
    <meta name=viewport content=width=device-width, initial-scale=1.0>
    <link rel=stylesheet href={{ url_for('static', filename='style.css') }}>
    <title>Flask Template</title>
</head>
<body>
    <h1>Flask Template</h1>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer nec odio. Praesent libero. Sed cursus ante dapibus diam. Sed nisi. Nulla quis sem at nibh elementum imperdiet. Duis sagittis ipsum. Praesent mauris. Fusce nec tellus sed augue semper porta. Mauris massa. Vestibulum lacinia arcu eget nulla. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos.</p>
</body>
</html>
```

After that, go back to the `WebApp` folder and create another folder called `static`, and inside create a file name `style.css` and paste this code inside.

```css
body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    background-color: #f4f4f4;
}

h1 {
    color: #333;
}

p {
    font-size: 1.1em;
    color: #666;
}
```

After that, simply run the `app.py` file through the Python Interpreter or IDE. 

I hope this helps, let me know if you need anything else.
Will JavaScript work with this, or I will have to make handlers in the Python code?
Yes, JavaScript will work with this setup without any issues. You can include JavaScript directly in your HTML files or create separate `.js` files and include them. There is no need to create handlers in the Python code for JavaScript to work.

To include JavaScript directly in your HTML file, you can use the `<script>` tag:

```html
<!DOCTYPE html>
<html lang=en>
<head>
    <!-- ... -->
</head>
<body>
    <!-- ... -->

    <script>
        // Your JavaScript code here
        document.addEventListener('DOMContentLoaded', function() {
            console.log(Hello from JavaScript!);
        });
    </script>
</body>
</html>
```

Alternatively, you can create a separate JavaScript file (e.g., `main.js`) and include it in your HTML file:

1. Create a `main.js` file in the `static` folder and add your JavaScript code:

```javascript
// main.js
document.addEventListener('DOMContentLoaded', function() {
    console.log(Hello from JavaScript!);
});
```

2. Include the `main.js` file in your `index.html` file:

```html
<!DOCTYPE html>
<html lang=en>
<head>
    <!-- ... -->
</head>
<body>
    <!-- ... -->

    <script src={{ url_for('static', filename='main.js') }}></script>
</body>
</html>
```

This way, you can utilize JavaScript for client-side interactivity and logic while using Python and Flask for server-side tasks.
Write me simple physical engine code in C++ please.