So Lua supports prototypal OOP!

prototypal.lua

--[[
   javascript:

   function SomeObject(name) {
       this.name = name
   }
   
   SomeObject.prototype.getName = function() {
      return "My Name is "+this.name+"!";
   }

   var obj = new SomeObject(name);
   console.log(obj.getName());


   Object.create(X){  function G() {}; G.prototype = X; return new G(); }

   
]]


Object  = {}
function Object.create(obj)
   obj = obj or Object
   local newobj = {}
   setmetatable(newobj, { __index = obj } ) -- prototype setting?
   return newobj
end

local bla = {}
bla.name="Robert"
function bla:getName()
   return "My name is "..self.name ..", how do you do?";
end

print(bla:getName())
local bla2 = Object.create(bla);
bla2.name="Cecil"
bla2.surname = "Von Bla"
function bla2:getSurname()
   return "My surname is "..self.surname.."..isnt that weird!?";
end
print(bla2:getName(), bla2:getSurname())
print(bla:getName())


local bla3 = Object.create(bla2)
bla3.name = "Charles"
bla3.surname = "Xavier"
print(bla2:getName(), bla2:getSurname())
print(bla3:getName(), bla3:getSurname())
print(bla:getName())

note the use of colons vs dots (: --> adds self param)