How to use classes in Actions tab

Hello guys!
I'm just a beginner so i'm sorry for my stupid question.I'm developing a game in which movie clips in our case people have their own schedule.I have multiple screens and so i want to be able to set their locations and make them invisible on other screens(rooms)they're not currently at.The trouble is i can't use variables from Actions in my class,neither can i use classes in my Actions.Can anyone tell me how to export classes into Actions code?
Here is my code:
var currentlocation;
var currentscreen;
if (person.currentlocation!==currentscreen){
person.visible=false;
btn.addEventListener(MouseEvent.CLICK, fl_MouseClickHandler);
function fl_MouseClickHandler(event:MouseEvent):void
          currentscreen = "classroom";
          classroom.visible = true;
          playroom.visible = false;
btn_2.addEventListener(MouseEvent.CLICK, fl_MouseClickHandler_2);
function fl_MouseClickHandler_2(event:MouseEvent):void
          currentroom = "playroom";
          classroom.visible = false;
          playroom.visible = true;

Your problem/question is not clear to me. If you are getting errors you should include the error messages in your posting.
Could the problem arise from using a variable that is not defined?
currentroom = "playroom";
I do not see currentroom defined as a variable anywhere. There is a currentscene variable though.

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