How to write plugins for Nagios?

Question

Nagios

Hello, I need to write the first plugin in my life (for educational purposes) for Nagios that will ping a remote server and that's it.
The simplest thing that was enough for me today is

#!/bin/bash
ping  192.168.0.37;

Where 192.168.0.37 is the ip of the remote host (which is visible in the hosts list)
As a result, the following is displayed in the list of plugins:

How to be? Is there a tutorial or instruction somewhere?
Thank you.

Answer 1

<NAME> <STATE> - <text> [| <perfdata>]
---
<NAME> - имя, MY_PLUGIN
<STATE> - возврат скрипта: OK/WARNING/CRITICAL/UNKNOWN/PENDING
<text> - какой-то текст возврата из скрипта
<perfdata> - данные для построения графика/ов