How do I make animation go to end frame, and back to start?

Okay, so... 'Detailed' Question.

I'm trying to make Animation go to end frame (40) and when UI button is pressed, go back to start (0).

Now, I'm trying to use

 GetComponent.<Animation>()["Animation"].time >= 1.5|| GetComponent.<Animation>()["Animation"].time <=0.0)
 {
 GetComponent.<Animation>()["Animation"].speed = 0;
 }

Its in FixedUpdate BTW

The problem is that if time goes more than 1.5, or below 0.0 too much. Making the animation speed 1 again doesn't work, because it is stopped instantly by this.

I'll show it by video. It happens around 01:15 minutes

YoutubeVideo

It may not seem that big a problem, but it happens randomly, and may be more common on slower PC's.

Help?

Seems like I have to just post the whole code. Its easier for you to understand.

 #pragma strict
 
 private var backward: int = 0;
 
 var MainCam: Animation;
 var Mainmenu: Animation;
 var NewGameMenu: Animation;
 
 function Play()
 {
 MainCam.GetComponent.<Animation>()["MainMenuCamRotate"].speed = 1;
 Mainmenu.GetComponent.<Animation>()["MainMenu1"].speed = 1;
 NewGameMenu.GetComponent.<Animation>()["NewGameMenu1"].speed = 1;
 MainCam.GetComponent.<Animation>().Play();
 Mainmenu.GetComponent.<Animation>().Play();
 NewGameMenu.GetComponent.<Animation>().Play();
 }
 
 function Stop()
 {
 backward = 1;
 }
 
 function Update(){
 if(backward==1)
 {
 MainCam.GetComponent.<Animation>()["MainMenuCamRotate"].speed = -1;
 Mainmenu.GetComponent.<Animation>()["MainMenu1"].speed = -1;
 NewGameMenu.GetComponent.<Animation>()["NewGameMenu1"].speed = -1;
 backward = 0;
 }
 }
 
 function FixedUpdate()
 {
 
 if(MainCam.GetComponent.<Animation>()["MainMenuCamRotate"].time >= 1.5 || MainCam.GetComponent.<Animation>()["MainMenuCamRotate"].time <=-0.1)
 {
 MainCam.GetComponent.<Animation>()["MainMenuCamRotate"].speed = 0;
 Mainmenu.GetComponent.<Animation>()["MainMenu1"].speed = 0;
 NewGameMenu.GetComponent.<Animation>()["NewGameMenu1"].speed = 0;
 }
 }