[Inexpensive scrolling marquee]

I forgot to include the original .bat file I started with in windows, pasted below for reference. It worked better with the nano for some reason.

@echo off
set g=%2
set p=%3
set o="%g:"=%-%p%"
set l=%1
::echo %o%
::echo %p%
::echo %g%
::echo %1
::pause
IF %l%==1 (GOTO bigbox)
IF %l%==2 (GOTO close)
IF %l%==3 (GOTO end)
IF %l%==4 (GOTO end)
IF %l%==5 (GOTO end)
IF %l%==6 (GOTO end)
IF %l%==9 (GOTO serial)
IF %l%==7 (GOTO end)
IF %l%==8 (GOTO system)
echo failed go
echo %l%
echo %2%
echo %3%
pause
GOTO end
:system
set o="Bigbox Platforms"
::echo %o%
::echo %p%
::echo %g%
::echo %1
::pause
GOTO Serial
:bigbox
mode com3 to=off rts=off dtr=off data=8 baud=115200 > nul
set o="BigBox Platforms" > nul
ping localhost -n 3 >nul
::echo %o%
::pause
GOTO Serial
:close
mode com3 to=off rts=off dtr=off data=8 baud=115200 > nul
set o="Goodbye..." > nul
ping localhost -n 3 >nul
::echo %o%
::pause
GOTO Serial
:serial
set /p x=%o% <nul >\\.\COM3
::pause
:end
exit