Can someone help me out with my prefabs? (JS)

Questions & Answers
1

My original object is the only one that remains after I press play. All the prefabs I made automatically delete themselves? It only happens with this one specific object.
#pragma strict

var coinEffect : Transform;
 
function OnTriggerEnter (info : Collider)
{
    if (info.tag == "Player")
    {
        Debug.Log("AddCoinCounter!!!!!");
        var effect = Instantiate(coinEffect, transform.position, transform.rotation);
        Destroy(effect.gameObject, 3);
        Destroy(gameObject);
       
    }
}
2

void start()
{
invokeRepeating(“CheckObj”,1,1);
}
void CheckObj()
{
if(GameObject.Find (“obj_Name(Clone)”))
{
Destroy (GameObject.Find (“obj_Name(Clone)”));
}
else
{
CancelInvoke(“CheckObj”);
}
}