void OnTriggerEnter2D(Collider2D coll)
{
if (coll != null)
{
Lead lead = coll.gameObject.GetComponent <Lead>();
if (lead != null)
{
lead.NewCoal();
GameObject trainobj = GameObject.Find("Train");
Train train = trainobj.GetComponent <Train> ();
train.CreateCoal();
Destroy(this.gameObject);
}
}
}