The script should look like this:
Show all records
Go To Record/Request [first]
Set Field [Members::Field; 0]
Go To Record/Request [next]
Exit Loop If [Members::Field=10]
Set field [Members::field ; Members::field +1]
Set field [Members::Home Address 2; 1]
Note the bits in red that differ from the script given in your original post.
While your script will work fine with a global text field, its a good habit to get into to use number type field for numbers, text fields for text and date fields for dates. FileMaker often lets you put the wrong type of data into a field and sometimes it works OK like this script. Other times such as when sorting or comparing values, it'll trip you up with unexpected results. Thus, it's a good practice to use the right field types consistently so you can avoid "head scratcher" results from your scripts.