Pomodoro Shell script

pomodoro.sh

#!/bin/sh
#
# Pomodoro script.
#
# Displays an alert after 25 minutes job / 5 minutes pause.
#
# Shell script for a simple Pomodoro technic
#
# Author: Bruno Almeida <bruno@disvolvi.com>
 
countdown()
(
  IFS=:
  set -- $*
  secs=$(( ${1#0} * 3600 + ${2#0} * 60 + ${3#0} ))
  while [ $secs -gt 0 ]
  do
    sleep 1 &
    printf "\r%02d:%02d:%02d" $((secs/3600)) $(( (secs/60)%60)) $((secs%60))
    secs=$(( $secs - 1 ))
    wait
  done
  echo
)

while true; do
	zenity --warning --title="Let's begin!" --text="For 25 minutes, get focused!" --width="400" --height="100" &&
	countdown "00:25:00" &&
	zenity --warning --title="Relex!" --text="For 5 minutes, take a break!" --width="400" --height="100" &&
	countdown "00:5:00"
done