--- NEED SERIOUS TO ANSWER THIS FORUM ---
1.Action=Prees F2 to Open the build menu
2.Menu:1.Wall 1,Wall 2,Wall 3,Turret,Double Turret
X=Me
#=Wall
Make like this:
No 1
###
#X#
###
No 2
#####
##X##
#####
No 3
#######
###X###
#######
Please help me!
sorry bad english!

You could do just normal spawn object with few loops to reduce the line amount.

.. Or you could learn something from DC samples.
I mean file consoles.lua and command "encage".
Try it, cause if someone will do everything for you, this in any way will not help you learn lua..
And these basics are easier to learn.