Can I create and manipulate unix "screens" in a script?

I have a work environment on my Ubuntu laptop in which I want to use three different screens.

Eg. in terminal, I usually write

screen -S myworkrun_server_1

then, ctrl-a c to create a second screen

run_server_2

etc.

I'd like to write a script to automate setting up this environment, but how can I control multiple screens from one script?

Update : I really want to be able to do this from a shell script, not a screen config. file. Is there a way to do that?