function MyAdd( num1, num2 )
    return num1 + num2,num1,num2
end

Code 0-1: LUA Function in File test.lua

import org.luaj.vm2.*;
import org.luaj.vm2.lib.jse.*;

public void setup()
{
    Globals globals = JsePlatform.standardGlobals();
    //LuaValue chunk = globals.load("print 'hello, world'");
    //chunk.call();
    globals.get("dofile").call( LuaValue.valueOf(sketchPath()+"/test.lua"));
    //call the function MyAdd with two parameters 7, and 5
    LuaValue MyAdd = globals.get("MyAdd");
    LuaValue retvals = MyAdd.call(LuaValue.valueOf(7), LuaValue.valueOf(5));
    Varargs retvals2 = MyAdd.invoke(LuaValue.valueOf(7), LuaValue.valueOf(5));

    println("Number of returned variables: "+retvals2.narg());
    println("num1 + num2: "+retvals2.toint(1));
    println("num1: "+retvals2.toint(2));
    println("num2: "+retvals2.toint(3));
}

Code 0-2: Processing-Sketch using "MyAdd"

function behavior(col,colwall,d,dr,dg,db,pr,pg,pb,mem0,mem1,mem2,mem3,mem4,mem5,mem6,mem7,mem7,mem8,mem9)

    countdown=mem0

    v=0
    w=0
    r=pr/2
    g=pg/2
    b=pb/2
    if ( (col==1 or colwall==1) and countdown==0) then
        countdown=20        
    end

    if ( countdown>0 ) then
        w=5
        v=0
        countdown = countdown - 1
        r=dr
        g=dg
        b=db
    else
        w=0
        v=10
    end

    mem0=countdown

    return v,w,r,g,b,mem0,mem1,mem2,mem3,mem4,mem5,mem6,mem7,mem8,mem9
end

Code 0-3: behavior.lua -- LUA-Skript welches das Verhalten beschreibt / LUA-Script Describing Behavior