Is it possible to repeat checking parent until workspace, then go back by one?

If the title didn't confuse you enough, I'm curious if this is possible --

Using a FindFirstChild type method, an if statement will check a block's parent (in this case, mouse.Target) until the parent becomes workspace, in which case it'll head back by one. I realize a large issue comes into play about storing, however.

I was thinking about it, and I could see the storage working by storing the last two checked parent's names in string values grouped into the script (possibly even plain variables stated in the script) , and whenever the first string is == to workspace, FindFirstChild in workspace with the name of the second string.

I believe that would work, but the issue comes up with the checking for parent loop -- I'm quite lost on how to achieve this!

I don't need a script written out or something of the sort, I'm mostly looking for how it'd be possible to do! Thank you for reading, and I hope to find a solution.