That code is from “Programming in Lua by Roberto Ierusalimschy, which was written for Lua 5.0. Now Lua is at version 5.1, that work is a little out of date but still useful as a starting point.

In the simulated world of Coding Simulator, where everyone is the CEO of their own coding company, you must create and sell Programs to earn IQ, Cash, and Diamonds. IQ is rewarded for each Program ...

La verdad es que llevo bastante sin postear ningun tutorial, así que, para que no os desanimeis, aquí os dejo esta listita de las funciones de LUA, que poco a poco iré traduciendo a castellano ...

The Horsham location will offer Code Ninjas JR for ages 5 to 7, which teaches basic coding and problem-solving skills through hands-on projects and storytelling, as well as Code Ninjas Create for kids ...