Remind me to stand up every 45mins. Zenity required

stand-up-reminder.sh

#!/usr/bin/env bash

while :
do
  for (( i=1; i <= 45; i++ ))
    do
      clear
      echo $((46-i)) "minutes left"
      sleep 1m
    done
  zenity --info --text="You already sitting for 45 minutes. Stand up\!"
done