How to use Screen component DO -LOOP in CBTA test script

Sir

We have installed  CBTA 3.0 SP1 is aligned with ST-TST 300 SP1 and Solution Manager ST 7.1 SP8 .

I have created test script for tcode VT01N. To pass multiple outbound deliveries in Outbound delivery selection screen,

can I use DO-LOOP screen components? . It possibile can any one provide sample testscript using these screen components

Pls help

Thanks  in advance