Pomodoro timer

p-timer.sh

# From http://navaneethkn.wordpress.com/2010/12/19/simple-egg-timer-on-linux-for-pomodoro-technique/
#!/bin/bash
counter=0
limit=$1
summary=$2
startmessage=$3
endmessage=$4
notify-send -u critical -i appointment -t 600 "$summary" "$startmessage"
echo
while [ $counter != $limit ]; do
   echo "$counter minutes so far...";
   sleep 60
   counter=$(( $counter + 1 ))
done
if [ $counter = $limit ]; then
   echo
   notify-send -u critical -i appointment "$summary" "$endmessage"
   echo -e '\a' >&2
   exit 0
fi

# to invoke...
# alias begin-pomodoro='sh ~/bin/p-timer.sh 25 "Pomodoro" "Pomodoro started, you have 25 minutes left" "Pomodoro ended. Please stop working and take a short break"'