Help with Variable, from my scene to a movieClip

programming flash
1

okay, so im new too programming and have just started out with AS3, im working on a school project to make a educational game. However im strugling with variables. i declared a int variable in my scene(frame 11) and then used this variable in a movieClip. Here is my code:

Scene 1, Frame 11:

import flash.events.MouseEvent;

//Variables
[COLOR=#ff0000]var speed:int = 1[/COLOR]


var score:Number = 0
var highscore:int = 0


var rndLow:int = 1
var rndHigh:int = 24
var rndLetter:Number = Math.floor(Math.random()*(1+rndHigh-rndLow))+rndLow;
var myString:String= String(rndLetter);


var currentState:int = 1


var btnResumes:MovieClip = new btnResume();
var btnPauses:MovieClip = new btnPause();
var btnPlays:MovieClip = new btnPlay();


btnPlays.x = 115
btnPlays.y = 180
btnResumes.x = 115
btnResumes.y = 180
btnPauses.x = 115
btnPauses.y = 180


addChild(btnPlays)


function plays(event:MouseEvent):void
{
   removeChild(btnPlays)
   addChild(btnPauses)
   currentState = 3
}


btnPlays.addEventListener(MouseEvent.CLICK, plays);


function resumes(event:MouseEvent):void
{
   removeChild(btnResumes)
   addChild(btnPauses)
   currentState = 3
}


btnResumes.addEventListener(MouseEvent.CLICK, resumes);


function pauses(event:MouseEvent):void
{
   removeChild(btnPauses)
   addChild(btnResumes)
   currentState = 2
}


btnPauses.addEventListener(MouseEvent.CLICK, pauses);


function mainMenu1(event:MouseEvent):void
{
   if (currentState == 1)
   {
       removeChild(btnPlays)
   } else if (currentState == 2)
   {
       removeChild(btnResumes)
   }else
   {
       removeChild(btnPauses)
   }
              
   gotoAndStop("Menu")
}


btnToMenu1.addEventListener(MouseEvent.CLICK, mainMenu1);


lblLol.text = myString


gotoAndStop("Game")

and here is my movieClip:

if ([COLOR=#ff0000]speed[/COLOR] == 1){
    this.x + 1
}else if ([COLOR=#ff0000]speed[/COLOR] == 2)
{
    this.x + 2
}else if ([COLOR=#ff0000]speed[/COLOR] == 4)
{
    this.x + 4
}else
{
    this.x + 8
}

it comes up with error 1120, the highlighted text is the variable i am struggeling with.
Ive been looking for an answer for hours now, any help is appreciated. Bimzy :toad: ps. Toad is awsome.