How to random Different Value - My code error or Bug ??

Unity Engine
1

This script for randoming multiple prefab ^ i have double this code and get 2 multiple prefab randomly at same time but here my problem :
1- the 1st is problem on my result is sometimes get 2 same value in random (How to get 2 a different random prefab at same times ^ random A-Random B , A not same value B)
2- The result Sometimes fixed in horizontal angle but sometimes 2 value image fused and sometimes in Vertical position (How to get Fixed colider image in horizontal line )
-Screen shot on Bottom-
This preview

using UnityEngine;
using System.Collections;

public class SpawnMultipleOBJ_angka : MonoBehaviour {

    private Vector3 startPosition;
    private float newXPos = 0f;
  
    public float moveSpeed = 1f;
    public float moveDistance = 4f;


    //initiate aray
    public GameObject[] gameObjectSet;

    public float timeLeftUntilSpawn = 0f;
    public float startTime = 0f;

    public float secondsBetweenSpawn = 3f;

    // Use this for initialization
    void Start () {
        startPosition = transform.position;
    }
    void SpawnRandomObject(){
        int whichItem = Random.Range (0, 9);
        //Debug.Log ("Our Random number is " + whichItem);
        GameObject myObj = Instantiate (gameObjectSet [whichItem])as GameObject;

        myObj.transform.position = transform.position;
    }

    // Update is called once per frame
    void Update () {
    //Move Distant
        newXPos = Mathf.PingPong (Time.time * moveSpeed, moveDistance) - (moveDistance / 2f);
        transform.position = new Vector3 (newXPos, startPosition.y, startPosition.z);
        timeLeftUntilSpawn = Time.time - startTime;

        if (timeLeftUntilSpawn >= secondsBetweenSpawn){
            startTime = Time.time;
            timeLeftUntilSpawn = 1;

                SpawnRandomObject();
        }
    }
}
2

[ code] [/ code] tags when you paste code into the forums please, it really helps with readability, there is a sticky at the top of the scripting forum on them…

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3

Like this

using UnityEngine;
using System.Collections;

public class SpawnMultipleOBJ_angka : MonoBehaviour {

private Vector3 startPosition;
private float newXPos = 0f;

public float moveSpeed = 1f;
public float moveDistance = 4f;


//initiate aray
public GameObject[] gameObjectSet;

public float timeLeftUntilSpawn = 0f;
public float startTime = 0f;

public float secondsBetweenSpawn = 3f;

// Use this for initialization
void Start () {
startPosition = transform.position;
}
void SpawnRandomObject(){
int whichItem = Random.Range (0, 9);
//Debug.Log ("Our Random number is " + whichItem);
GameObject myObj = Instantiate (gameObjectSet [whichItem])as GameObject;

myObj.transform.position = transform.position;
}

// Update is called once per frame
void Update () {
//Move Distant
newXPos = Mathf.PingPong (Time.time * moveSpeed, moveDistance) - (moveDistance / 2f);
transform.position = new Vector3 (newXPos, startPosition.y, startPosition.z);
timeLeftUntilSpawn = Time.time - startTime;

if (timeLeftUntilSpawn >= secondsBetweenSpawn){
startTime = Time.time;
timeLeftUntilSpawn = 1;

SpawnRandomObject();
}
}
}
[/core]