#+OPTIONS: toc:nil
* Sleep calc

Silly script in Lua to help me with sleep planing. Should work well in termux.
Developed with Lua5.3 should work in any Lua5

** What it does:

It prints what are the best times to wake up and duration of sleep when presented wake up times are used.
Like this:

#+BEGIN_SRC bash
$ # now it's 01:34; we expect to fall asleep in 5 minutes
$ ./sleepCalc.lua 5
If gonna fall sleep at: 01:39
Wake up | to sleep
------------------
03:04   | 01h30m
04:34   | 03h00m
06:04   | 04h30m
07:34   | 06h00m
09:04   | 07h30m
10:34   | 09h00m
12:04   | 10h30m
13:34   | 12h00m
#+END_SRC

** Usage

- Two (optional) positional arguments
  1) Number of minutes you estimate it will take you to fall asleep
     - Default is 40 because I'm the only expected audience and I always to pray to Luna & Celestia before sleep
  2) How many minutes one sleep cycle takes
     - Default is 90minutes

** Notice

- Don't quote me on this I haven't actually done any research in this area
- This is just summarized knowledge I collected from randoms on the internet
- Most of it is probably wrong or oversimplified
- Total amount of research that went into this is < 5
- I just did it a few times and felt it actually worked (could be placebo)

** Basic ideas

- Ideal power nap is 20min
- Light sleep part of sleep is every 1h30m
- if you wake up in some multiple of 90 minutes, you should feel fresh a well rested