I'm making a 3D DNA model - simple question?

I know how to make it and I've followed the structure and color coding that was given to me by my textbook, however, my strand is too short.

I want to make it longer but I'm confused about whether I'm allowed to repeat the pattern again to end up with a longer stand. Any help?

Question

I'm making a 3D DNA model - simple question?

I know how to make it and I've followed the structure and color coding that was given to me by my textbook, however, my strand is too short. 

I want to make it longer but I'm confused about whether I'm allowed to repeat the pattern again to end up with a longer stand. Any help?

anonymous · Answer

Yeah you're allowed. 

Real strands of DNA have many base pairs. 

You already know that A goes with T 
and G goes with C. 

As long as you keep that up, you're fine.