NOTE: In order to make the best use of this script, you'll need to install the Pushover app in your desired device, and also generate userkeys and apikey for use with your app.

Start by running - python3 countdown-timer.py -h

This will give an overview of arguments you can give.

Example usages:

1. python3 countdown-timer.py --time 1h30m
2. python3 countdown-timer.py --time 1m30s
3. python3 countdown-timer.py --time 90m
4. python3 countdown-timer.py --time 30s
5. python3 countdown-timer.py --time 90h