Batch/CMD Timer: A tool help you count time

REM This script measures time
chcp 65001
echo off
title Script to measure time
cls
:start
echo ┌────────────────────────────────────┐
echo │Press enter to START measuring time.│
echo └────────────────────────────────────┘
set /p sessionTitle="Set timer session title or press enter >"
if not defined sessionTitle (set sessionTitle=unnamed session)
call :tstart
title Measuring time... %sessionTitle%
REM Saving start to log file
echo %date% - %sessionTitle%>> timelog.log
echo  ╔═══════════════════════╦═══════════╗>> timelog.log
echo  ║Time of initialization ║%starttime%║  Total time:>> timelog.log
REM End of log file print
echo.
echo ┌─────────────────────────────────────────────┐
echo │Now press any key to STOP and display result.│
echo └─────────────────────────────────────────────┘
pause
call :tstop
title Script to measure time... %sessionTitle%
echo.
echo ───────────────────────────────────────────────
call :timer
goto start
REM timer
:tstart
set starttime=%time%
goto eof
:tstop
set endtime=%time%
goto eof
:timer
set/a hour= %endtime:~0,2% - %starttime:~0,2%
set/a min= %endtime:~3,2% - %starttime:~3,2%
set/a sec= %endtime:~6,2% - %starttime:~6,2%
set/a cents= %endtime:~-2% - %starttime:~-2%
if %cents:~0,1% == - ( set/a sec -= 1 && set/a cents += 100 )
if %sec:~0,1% == - ( set/a min -= 1 && set/a sec += 60 )
if %min:~0,1% == - ( set/a hour -= 1 && set/a min += 60 )
if %hour:~0,1% == - ( set/a hour += 24 )
echo Rendering timer:
echo  ╔═══════════════════════╦═══════════╗  Total time:
echo  ║Time of initialization ║%starttime%║   hours .............. %hour%
echo  ╟───────────────────────╫───────────╢   minutes ............ %min%
echo  ║   Time of execution   ║%endtime%║   seconds ............ %sec% %cents%/100
echo  ╚═══════════════════════╩═══════════╝
REM Saving to log file
echo  ╟───────────────────────╫───────────╢   hours .............. %hour% >> timelog.log
echo  ║   Time of execution   ║%endtime%║   minutes ............ %min% >> timelog.log
echo  ╚═══════════════════════╩═══════════╝   seconds ............ %sec% %cents%/100>> timelog.log
echo.>> timelog.log
goto eof
rem Written By FlyFar
:eof