How do I load a .swf onto a flash pro file?

Question

My class i'm taking right now is using Adobe: Flash Professional CC Classroom in a book, and there's a point in the lesson where you upload/load a swf file(s). Technically it's supposed to be multiple because its the outline coding for a website, but I'm not understanding this...
page1_mc.addEventListener(MouseEvent.CLICK, fl_ClickToLoadUnloadSWF_5);
import fl.display.ProLoader;
var fl_ProLoader_5:ProLoader;
//This variable keeps track of whether you want to load or unload the SWF
var fl_ToLoad_5:Boolean = true;
function fl_ClickToLoadUnloadSWF_5(event:MouseEvent):void
  if(fl_ToLoad_5)
  fl_ProLoader_5 = new ProLoader();
  fl_ProLoader_5.load(new URLRequest("http://www.helpexamples.com/flash/images/image1.jpg"));
  addChild(fl_ProLoader_5);
  else
  fl_ProLoader_5.unload();
  removeChild(fl_ProLoader_5);
  fl_ProLoader_5 = null;
  // Toggle whether you want to load or unload the SWF
  fl_ToLoad_5 = !fl_ToLoad_5;
I know that I have to have the swf file in the same folder as the Parent file, and the name of the 'small page/file' goes in the url "" up there but what other connection am I missing?
Why Is the Test File basically strobing??
Thanks so much guys in advanced!
Shadows  : )

Answer 1

my guess is that if its strobbing you may be missing a Stop();
function