Pomodoro timer as similar to the online focus booster as a shell script

gistfile1.sh

function alarm() {
    # First argument is the number of minutes spent on work (one pomodoro)
    # Second argument is the rest time.
    # I usually invoke this as alarm 30 5 (work for 30 minutes, rest for 5)
    work_time=$(echo "$1*60" | bc)
    rest_time=$(echo "$2*60" | bc)
    ( mpg123 --loop -1 ~/scratch/clock-ticking-4.mp3 > /dev/null 2>&1 &
	mpg123pid=$!
	(sleep ${work_time} && 
	    kill $mpg123pid && 
	    mpg123 -d 5 ~/scratch/alarm-clock-1.mp3 > /dev/null 2>&1  &&
	    mpg123 --loop -1 ~/scratch/clock-ticking-4.mp3 > /dev/null 2>&1 &
	    mpg123pid=$!
	    (sleep ${rest_time} && 
		kill $mpg123pid && 
		mpg123 -d 5 ~/scratch/alarm-clock-1.mp3 > /dev/null 2>&1 
	    )&
	)&
    )&
    disown
}

# Sound effect files obtained from http://www.soundjay.com/clock-sounds-1.html