**Planning window management features**

I'm thinking about implementing a minimize button that hides the window and toggles a minimized state. Each window will correspond to a taskbar button, allowing the user to click the taskbar to toggle minimize or restore.

I need to keep track of the windows array and their z-index. For desktop icons, I could create a structure that includes an icon character, maybe using emojis or pixel art, and double-clicking the icon should open the associated window.

I’ll also set up a clock that updates every second, and a Start button that opens the menu positioned above the taskbar. After that, the taskbar will contain the Start button, window buttons, and a notification area with the clock. Closing a window will remove its taskbar button, but I’d like to allow reopening through the Start menu items. Finally, I plan to implement some sample windows like "My Computer," "Notepad," "About," and "Control Panel."**Creating pixel icons in HTML**

I'm thinking about using icons for the application. Since I can't use external images, I can create pixel-like icons using CSS, like small squares with borders and shapes inside. It's important to ensure everything remains in a single file.

I'll also need to handle edge cases, like distinguishing between double-click and single-click events for icons, especially on touch devices, which may need a separate approach.

Now, I’ll write the code for the index.html using the developer tool, ensuring to keep the content self-contained and adding minimal comments to guide understanding. Let's get started on that!