@echo on
cd
setlocal 
set /a Col=1

:ColLoop
Set /a row=1
:RowLoop

set NewFileName = 
set NewThumbName = %NewFileName%_tb
Copy  Img_blank.jpg Img_%Col%_%Row%.jpg
copy  Img_blank_tb.jpg Img_%Col%_%Row%_tb.jpg
pause 
set /a Row=%Row%+1
pause
if not %Row%==7 goto RowLoop
set /a Col=%Col%+1
if not %col%==5 goto ColLoop