My script does not work anymore

Unity Engine
1

I have used this script and everything worked fine. But now does not work, I can’t understand what happened. I think it is an error on Unity. What do you think?

#pragma strict
 
     var mainPrefab : GameObject;
     var secondPrefab : GameObject;
     var thirdPrefab : GameObject;
     var fourthPrefab : GameObject;
   
 
 
   
     function OnTriggerEnter2D(other:Collider2D)
    {
    switch( Random.Range(0,4))
    {
            case 01:secondPrefab.transform.position.x = mainPrefab.transform.position.x +(35); secondPrefab.transform.position.y = -1.7; Debug.Log("One");  break;
            case 02:thirdPrefab.transform.position.x = mainPrefab.transform.position.x +(35); thirdPrefab.transform.position.y = -1.7; Debug.Log("Two"); break;     
            case 03:fourthPrefab.transform.position.x = mainPrefab.transform.position.x +(35); fourthPrefab.transform.position.y= -1.7; Debug.Log("three");  break;
         
    }
    }

I make a 2D Endless Runner. I want spawn the platform where the character run. But now doesn’t work anymore.

2

Please use CODE tag when pasting code and explain more about what is not working and what is expected.

3

Can you explain it , any errors getting while the scene is played ?

4

You need to add default: break; in end of your switch.

5

while my scene is playing everything is ok. But the script looks like desactivate. I do not know how to explain it. Two weeks ago that script worked perfectly