How to implement a .bat to copy a non-empty file with a counter up to a certain value?

Question

cmd/bat

Hello, there is a 1023.txt file that needs to be copied with the information saved up to 1029.txt. How can this be done? The code for the basics used from the topic Creating a simple .bat to create .txt files?

if exist 1023.txt (
  set /a counter = 1
  goto LOOP
)
xcopy 1023.txt
goto END

:LOOP
if exist 102%counter%.xlsx (
  set /a counter += 1
  goto LOOP
)
xcopy 102%counter%.xlsx

:END

I'm sorry for such a stupid question