Re****t : having two differents looks for repeat line

Hi there,

I have a re****t with repeating lines

I need to have line 1 with look 1 (say background color to black)
and line2 with look2  (say background color to white)
and line 3 with look 1
and line 4 with look2

and so on

how can I do that in Access 2003 ? with coding or directly in Access ?

Sorry if this is a beginner question :)

Thanks for any help!