Thank you for your help!
After playing around for a while, I came up with a nice XPResso solution. I’ve attached a screenshot.

The animations that I plan on using it in are product demonstrations, so I needed something I can use/reuse within larger keyframed animations. I’n not sure if I would have been able to loop just a portion with key framing while having the rest of the animation continue.
But thank you again for your help.