How to prevent batch window from closing when error occurs?-Collection of common programming errors

I’m trying to write batch script to create a folder if it does not already exist. Following up the online examples, below is my script.

The problem is; first pause works, then probably due to syntax error the window closes even before reaches to the second pause, so I can’t really tell which part of my script is wrong.

Could anyone show me how to prevent closing window so that I can see what’s on the window?

@echo off

:copy theme images over
:designer
echo copying theme images over...
pause
if not exist "%K2DIR%\K2 SmartForms Runtime\Styles\Themes\Sharepoint 2013\rich_text"
(
    md "%K2DIR%\K2 SmartForms Runtime\Styles\Themes\Sharepoint 2013\rich_text333"
)

pause