Sleep-Cycle-Calculator: A handful tool for a better sleep

Introduction:

This app aims to help people who are experiencing fatigue or powerless when they first wake up in the morning. By sleep with cycles, it will provide you a better sleep quality and also enough energy for a whole new day.

How to use:

There are a few option that may benefit you, choose the most suitable one

1. Calculate the time you need to sleep to wake up at given time
2. Calculate what time to wake up at given bed time
3. Calculate what time to wake up if you start to sleep now

Error Handling:

1. There will be an error if the datatype/value entered is not valid and the program will continuosly require for another one until it's fixed
2. Invalid command:

Notice:

1. Be aware that hour/minnute entered should be only one digit if it less than 10: e.g: Type: 1,2,3... instead of 01,02,03,...
2. The sleep now is fixed at the time the code is compiled, so try to re-compile the code for a new time
3. Many thanks to (https://www.asciiart.eu/space/moons) for ASCII arts.