Hello Roger!
The Sandbox is the home for getting access to Cisco tech, such as IOx. If you're looking for more info on IOx, there's two major places to look.
First, check out the IOx dev center, which has tons of info! https://developer.cisco.com/site/iox/
If you're looking for a hello world, you'll want to check out the Learning Labs, which has great IOx walk-throughs: https://learninglabs.cisco.com/labs/tags/IOx/page/1
(Filter or search for IOx.)
Please let us know if this helps you out, and if you've got any other questions!
Thanks!
Jacob
