Create a second display, how?

[Jimmy Spam]

Hello friends,

please, excuse my poor english.

I have a .sh script which have this line:

"export DISPLAY=localhost:13"

and only work fine if vnc is running.... it's very strange.

I suppose that vnc create a new display (13) and if it isn't running,  
this display doesn't exist and script fail.

Can I create a second display directly with Xorg, set the DISPLAY  
variable of the script to this second display and stop vnc????

I want launch this script without need of run vnc.

Regards,
Thank you very much