InDesign Punched out text Help

Hi does anyone know how to make the text automatically punched out (so that it's white) the image that it goes across. So half the text is black the other half is white so it look something like the attached image. I am using InDesign CS5. I would like it, that at least one character is half black half white.

Thanks

Outline the type
place over black box
select the type and the box
Go to Object>pathfinder>exclude overlap