countdown.sh

# Countdown
function countdown(){
   echo "Countdown started: $1 minutes" 
   background_countdown $1 &
}
function background_countdown(){
   date1=$((`date +%s` + $1 * 60)); 
   while [ "$date1" -ge `date +%s` ]; do
     :
   done

   terminal-notifier -message "Time's up. $1 minutes passed."

   #for i in `seq 1 3`; do
     #echo -en "\007" # beep
   #done
}