Batch Parallel & Sequential Subprogram launcher

@ECHO OFF
TITLE %~n0

:: REM Each subrograms path to be run in parallel is to be passed as parameters to the launch function.
:: REM Sequential Launching is achieved with Additional instances of Call with parameters

CALL :Launch "program1_1.bat" "program1_2.bat" "program1_3.bat"
CALL :Launch "program2_1.bat" "program2_2.bat" "program2_3.bat"

ECHO Subs Complete
PAUSE >nul
EXIT

:Launch
FOR %%a IN (%*) DO (
    START "+++batch+++" "%%~a"
)

:Loop
    TIMEOUT /T 1 >nul
    TASKLIST /FI "windowtitle EQ +++batch+++*" |FIND "cmd.exe" >nul && GOTO :Loop
GOTO :EOF