can some 1 help with my script. im making a wood cuting script.

im making a wood cutting script and i got the basics.

i can shop te tree down the health drains the tree wil be removed and there is spawning a log

but the logs wil also be destroyed
i hope some 1 can help

   #pragma strict
 var startingHealth : int = 40;            
 var currentHealth : int;                   
 var logs :Transform;
 var tree :GameObject;
 var oak :GameObject;
                                          
 private var isDead : boolean;                                
 
 
 function Awake ()
 {
      currentHealth = startingHealth; }
 
       public function TakeDamage (amount : int, hitPoint : Vector3)
     {
    
     if(isDead)
     
     return;
 currentHealth -= amount;
 if(currentHealth <= 0)
 {
    
     Destroy ();
 }
 }
    function Destroy ()
    {
    //Destroy (gameObject, 2f);
 
 var position : Vector3 = Vector3(Random.Range(.1, .1), 2, Random.Range(.1, .1));
 Instantiate(logs, transform.position, transform.rotation);

 }