function of LunaLua

[Superfrancybros]

how to use LunaLua In SMBX?

[Emral]

Do you know how to solve problems given nothing but a sandbox and a set of tools to work with? If yes, continue to the next question. If no, that's a skill that will be very useful to attain. Programming essentially gives you a couple of tools (math, variables, and conditionals) you can use to solve problems and create things.

Do you know about programming, more specifically in lua?
If yes, read the next paragraph. If no, start here and work your way through the basic concepts: https://www.tutorialspoint.com/lua/lua_environment.htm

Once you have that down, you can begin with the specific tutorials for lunalua (a good place to start for people with a bit of prior programming experience): viewtopic.php?f=105&t=23739

Once you know the basics, you can use the wohlsoft documentation and the handbook to learn about the variables and functions lunalua provides.
https://docs.codehaus.moe/#/handbook/introduction
https://wohlsoft.ru/pgewiki/Category:LunaLua_API (sometimes outdated)