stop ();

function setup():void{
    vlab.objek(beaker);
    vlab.objek(tripod);
    vlab.objek(burner);
    vlab.objek(termometer);

    vlab.tombol (resetBtn, vlab.resetVlab);

    vlab.setLantai (590);

    beaker.drag = true;
    beaker.gravitasi = true;
    beaker.warna = "putih";

    tripod.drag = true;
    tripod.dragY = false;

    burner.drag = true;
    burner.dragY = false;

    termometer.drag = true;

    slider.nilaiMin = 20;
    slider.nilaiMax = 100;
    slider.nilai = 40;
    slider.update();

}

function update(e:Event):void{
    vlab.startVLab(setup);
    beaker.volume = slider.nilai;
    burner.menyala = onoff.on;
}

stage.addEventListener(Event.ENTER_FRAME, update);

// Function to stop the update function
function stopUpdate():void {
    stage.removeEventListener(Event.ENTER_FRAME, update);
}

// Event listener for navigation or cleanup
btn_exit.addEventListener(MouseEvent.CLICK, menuawalexit);

// Inside menuawal function or wherever you handle navigation or cleanup
function menuawalexit(e:MouseEvent):void {
    // Other cleanup tasks, if any
    //Runing Stop update
    stopUpdate();
    gotoAndPlay (1,"menustart");

}