To start macro in row 8, what would I change

[ILoveStMartin]

This adds a period to the left and the right of each row of numbers in column A.
Got it from someone on the board, but have not figured out what to change if data does not start in row 1
To start macro in row 8, what would I change?

Sub test
Dim LR&, r&
LR = Range("A" & rows.count).end(xlup).row
For r = 1 to LR: Cells(r, 1) = "." & Cells(r, 1).value & ".": Next
End sub