Binary addition on ABAP

Hi,

I need a way to simulate binary addition on abap: example

000

001

010

011

100

so if i add 1, then the next value is 101. the lenght would also vary from 2 to 8.

ex. 2

00

01

10

11

I would need this for mass uploading the release statuses for PO. i would use this as an internal table to finaly map it on T16FK (Release statuses)