Script to extract last 'n' number of lines from a text file

@echo off > newfile.TXT & setLocal enableDELAYedexpansion

set N=

for /f "tokens=* delims= " %%a in (C:\TEST.TXT) do (

set /a N+=1

)

set /a X=!N!-4

set N=

for /f "tokens=* delims= " %%a in (C:\TEST.TXT) do (

set /a N+=1

if !N! gtr !X! echo %%a >> newfile.TXT

)