This online Arduino Programming Tool is great

Now you can program your Arduino Uno straight from the hullpixelbot.com site

This is an awesome and very useful tool:

https://github.com/dbuezas/arduino-web-uploader

it allows you to deploy Arduino Uno applications directly into a device from a web browser. Just what you want to do if you happen to have an Arduino Uno controlled robot that needs software. Like I do.

It means that you can now create and program your Hull Pixelbot without needing to download any code. You can load the HullOS operating system into your robot and then use the Hull Pixelbot Python-ish editor to deploy the code.