Here's the code I came up with that will let you set up Random Enemies, spawnPoints, maxEnemies and min/max time to wait between each respawn.

This works great but I have one hitch to figure out. Sometimes when the Enemy is instantiated, the model will randomly default to the base T-Pose with no components. Furthermore, any other instances spawned at that spawnPoint will also be locked in the base T-pose, overlapping. They have enough time to clear each other's location/spawnPoint so that's not it either.

Any ideas?

// Add this script to a Parent GameObject of the spawnPoints.
// Note: enemyPrefab will have an AI script attached which will already Tag the Player object 
// so it won't be needed here.

var spawnPoints : Transform[];  // Array of spawn points to be used.
var enemyPrefabs : GameObject[]; // Array of different Enemies that are used.
var amountEnemies = 20;  // Total number of enemies to spawn.
var yieldTimeMin = 2;  // Minimum amount of time before spawning enemies randomly.
var yieldTimeMax = 5;  // Don't exceed this amount of time between spawning enemies randomly.

function Start()
{
    Spawn();
}

function Spawn() 
{ 
   for (i=0; i<amountEnemies; i++) // How many enemies to instantiate total.
   {
      yield WaitForSeconds(Random.Range(yieldTimeMin, yieldTimeMax));  // How long to wait before another enemy is instantiated.

      var obj : GameObject = enemyPrefabs[Random.Range(0, enemyPrefabs.length)]; // Randomize the different enemies to instantiate.
      var pos: Transform = spawnPoints[Random.Range(0, spawnPoints.length)];  // Randomize the spawnPoints to instantiate enemy at next.

      Instantiate(obj, pos.position, pos.rotation); 
   } 
}  

I just added a component like this to a game I'm working on, and I'll explain what we did.

Create a "Spawner" game object, and add various spawn points as children, placing them in the world wherever you want them. Inside of the "Spawner" object, you'd want to do something like this:

// Place this code inside a loop or function
// whenever you want the object to spawn at a random location.
Transform[] spawnPoints = GetComponentsInChildren(typeof(Transform)) as Transform[];
Instantiate(myGameObjectPrefab, spawnPoints[Random.Range(0, spawnPoints.Length)], Quaternion.identity);

That gets all the transform components inside all of the children (which are your spawn points), and then instantiates a prefab at one of the spawn points randomly. Be sure to set the myGameObjectPrefab variable as a public variable in your script, and then set its value using the Inspector in the editor...something like this:

public GameObject myGameObjectPrefab;

oke, i tried some things. this one was the best working.

using UnityEngine;
using System.Collections;

public class PlayerMove : MonoBehaviour {

    public int Speed;
    public float Jumpheigt;
    public bool Jump = false;
    public AnimationClip walk;
    public int totalScore; 

    private camerascript CS;   
    private float rote = 90;
    private bool checkrote;
    private Transform currentpos;

    void Start()
    {

       CS = GameObject.Find("Camera").GetComponent<camerascript>();

    }



    void FixedUpdate () 
    {
       if(Input.GetKey(KeyCode.D))
       {

         rigidbody.AddForce(Vector3.back * Speed);
         animation.Play();

         if(Input.GetKey(KeyCode.W))
         {

          rigidbody.velocity = Vector3.up * Jumpheigt;

         }

       }
       else if(Input.GetKey(KeyCode.A))
       {

         rigidbody.AddForce(Vector3.forward * Speed);
         animation.Play();

         if(Input.GetKey(KeyCode.W))
         {

          rigidbody.velocity = Vector3.up * Jumpheigt;

         }

       }
       else if(Input.GetKeyDown(KeyCode.W))
       {

         rigidbody.velocity = Vector3.up * Jumpheigt;
         animation.Play();

       }
       else
       {

         animation.Stop();
         return;

       }

    }

    void Update()
    {

       if(Input.GetKeyDown(KeyCode.D))
       {

         if(checkrote == true)
         {

          transform.Rotate(transform.rotation.y, rote, Time.deltaTime);
          CS.setOn = true;
          checkrote = false;

         }

       }
       else if(Input.GetKeyDown(KeyCode.A))

       {
         if(checkrote == false)
         {

          transform.Rotate(transform.rotation.y, -rote, Time.deltaTime);
          CS.setOn = false;
          checkrote = true;

         }

       }
       else
       {

         return;

       }

    }

    public void score(int score)
    {

       totalScore = totalScore + score;
       Debug.Log("je hebt : " + totalScore + " aan punten");

    }
}

but it still won't work properly

please some advice

thanx a lot