Okay. This script looks like what I've been trying to do. thanks you
However It's not targeting the "parent page", Rather the "root".
SO I tested with: {% CurrentDocument.DocumentName |(identity)GlobalAdministrator%} in the repeater to see what's the current document name is. It returned "Home". I guess because the repeater exists on the home page.
Do you know how I can target the 'Parent page'. Which is a child of 'Home'. That's where the field exist.
Root
-- Home
-----Parent Page
------Child
------Child
------Child