[sharksoda]

everything you could do in 3.9 is easy to do with Lua in 4, it's the new stuff that can get complicated.
basic format:

local t = Def.ActorFrame {
  LoadActor( "something" )..{
    InitCommand=cmd(x,SCREEN_CENTER_X;y,SCREEN_CENTER_Y;zoom,0.5);
    OnCommand=cmd(smooth,0.35;zoom,1);
    OffCommand=cmd(smooth,0.3;zoom,0);
  };
  LoadActor( "something else" )..{
    InitCommand=cmd(diffuseblink);  
  };
};
return t;

edit: method #2:

local t = Def.ActorFrame{};
t[#t+1] = LoadActor( "whatever" )..{ InitCommand=cmd(put stuff here); };
return t;