Shell Programming and Scripting

alarm () #A simple alarm program that I wrote
{
if [ -z "$1" ];then #if no time is specified, exit with a warning
printf "You must specify a time to use this function"
return
fi
if [ -z "$2" ];then #if no alarm music is specified, then just count down to alarm time
alarm="Alarm set for $1"
date=$(date '+%H%M%S')
until [ "$date" = "$1" ];do
printf "$alarm\nNope, it's not time yet, it's only $date"
#sleep 1
date=$(date '+%H%M%S')
clear
done
elif
[ -n "$2" ];then #Check to see if alarm music is specified
        if [ ! -f "$2" ];then #make certain that the alarm music is a real file, if it is, play that file, if not play default alarm 
        echo "Uh-oh, it looks like the file you've chosen doesn't exist, so I'm just going to play Strangers by The Kinks"
        alarm="Alarm set. At $1 Strangers by The Kinks will be played"
        date=$(date '+%H%M%S')
        until [ "$date" = "$1" ];do
        printf "$alarm\nNope, it's not time yet, it's only $date"
#       sleep 1
        date=$(date '+%H%M%S')
        clear
        done
        cygstart /home/D/strangers.mp3 &
        else
        alarm="Alarm set. At $1 $2 will be played"
        date=$(date '+%H%M%S')
        until [ "$date" = "$1" ];do
        printf "$alarm\nNope, it's not time yet, it's only $date"
        #sleep 1
        date=$(date '+%H%M%S')
        clear
        done
        cygstart "$2" &
fi
fi
}