(Help!) Having one scene loop, and when you push a button, it goes to another scene and ends (With a repeat button)

I'm newer to ActionScript 3, so I'm not totally sure as to what I'm doing.  Hopefully someone can help!

For scene 1 (Which is 40 frames long) I have this code for 4 buttons up to frame 39 -

          import flash.events.MouseEvent;

          button1.addEventListener(MouseEvent.CLICK, goNormal);

          function goNormal(event:MouseEvent):void {

            stage.frameRate = 20

          }

          button2.addEventListener(MouseEvent.CLICK, goMedium);

          function goMedium(event:MouseEvent):void {

            stage.frameRate = 38

          }

          button3.addEventListener(MouseEvent.CLICK, goFast);

          function goFast(event:MouseEvent):void {

            stage.frameRate = 60

          }

          button4.addEventListener(MouseEvent.CLICK, goEnd);

          function goEnd(e:MouseEvent):void {

            gotoAndStop("Scene 2", 1);

          }

On the last frame (40), I have "stop();"

On scene 2, I have "play();", so that it plays, then on the last frame of that, "stop();"

I'm pretty confused.

Basically, I want to make it to where I can have the first 3 buttons change the FPS of the first scene, but I want it to loop back (and not go to scene 2).  I then want button 4 to go to Scene 2 and end the file, but with a repeat button where it repeats to scene 1.

Thanks in advance!