15 min Alarm part2

So , here i am with the code. Rather i have two. I have one which is based in 'absolute times' using the system clock and the other is based on 'relative time'.

This is the code for the 'absolute time' based reminder. Reminds at 10,20,30,40,50 and 00 minutes on the clock.

REM File name: Reminder.bat

REM Description: this is a Batch file that plays a song every 10 mins.

REM The song can be specified in place of "D:\dwnlds\AIRTEL.wav"

:again

@echo off

REM Takes the system time

set t=%time%

REM t2 = seconds

set t2=%t:~6,2%

REM t1 = minutes

set t1=%t:~3,2%

REM One can specify at what minutes do you want a reminder

if %t1%==00 goto alarm

if %t1%==10 goto alarm

if %t1%==20 goto alarm
if %t1%==30 goto alarm
if %t1%==40 goto alarm
if %t1%==50 goto alarm

REM provides a delay of 1 sec.

CHOICE /n /C 12 /d 1 /t 1

cls

if errorlevel == 1 goto again

if errorlevel == 2 goto again

:alarm

if %t2%==30 goto sing

cls

goto again

:sing

REM can provide the link to the desired media player like VLC,etc.

REM provide the link to the compatible audio file .

start "C:\Program Files\Windows Media Player\wmplayer.exe" "D:\dwnlds\AIRTEL.wav"

REM provides a delay of 1 minute.

CHOICE /n /C 12 /d 1 /t 60

cls

if errorlevel == 1 goto again

if errorlevel == 2 goto again

goto again