Simple pomodoro timer in a shell

pomodoro.sh

#!/bin/sh
  WORK_DURATION=$(echo "60 $1 * p" | dc)
  PLAY_DURATION=$(echo "60 $2 * p" | dc)
  echo "WORK DURATION: $WORK_DURATION seconds"
  echo "PLAY DURATION: $PLAY_DURATION seconds"
  while :
  do
     echo "WORKING FOR $1 minutes"
     sleep $WORK_DURATION && \
     echo "^G" && \ 
     say "PLAY FOR $2 MINUTES" && \
     echo "^G" && \ 
     sleep $PLAY_DURATION && \
     echo "^G" && \ 
     say "WORK FOR $1 MINUTES" && \
     echo "^G" 
  done