@echo off
title Chat-Auto
setlocal enabledelayedexpansion

for /f "tokens=*" %%a in ('find /v /c "" ^< "console.log"') do set /a nb=%%a
set /a delMsg=!nb!-31
set /a nbLine=0
if exist "consoleLimit.log" del /q "consoleLimit.log"
for /f "tokens=*" %%b in ('type "console.log"') do set /a nbLine+=1 & if !nbLine! GTR !delMsg! echo;%%b >> "consoleLimit.log"

:loop
if exist ok del /q ok&call :Limit 40
goto :loop





:Limit
set /a ListMsg=%~1-2
mode con lines=%~1 cols=150
for /f "tokens=*" %%a in ('find /v /c "" ^< "consoleLimit.log"') do set /a nb=%%a
set /a delMsg=!nb!-31
set /a nbLine=0
for /f "tokens=*" %%b in ('type "consoleLimit.log"') do (
  if "!nbLine!"=="0" del /q "consoleLimit.log"
  set /a nbLine+=1 & if !nbLine! GTR !delMsg! echo;%%b >> "consoleLimit.log"
)
type consoleLimit.log
goto :eof

pause>nul