How would I make a child object spawn at a certain location in reference to the parent, and then destroy them. Specifically, I'm seeking to do it with this bit of code:

var hit : RaycastHit;
var keyCode : KeyCode;
var state = 1;

function Update () {

if (Input.GetKey (KeyCode.X)){
    if (Physics.Raycast (transform.position, new Vector3(0,-1,0), hit, 10) ){
        if (hit.collider.gameObject.tag=="Ninja") {
            if (state== 1){
                state=1;
                }
            if (state==2){
                state=1;
                }
            }
        }   
    }

if (Input.GetKey (KeyCode.Return)){
    if (Physics.Raycast (transform.position, new Vector3(0,-1,0), hit, 10) ){
        if (hit.collider.gameObject.tag=="Samurai") {
            if (state==1){
                state=2;
                }
            if (state==2){
                state=2;
                }
            }
        }
    }

if (state=1){
    //script to spawn child object goes here
    }
if (state=2){
    //script to destroy children goes here
    }

}

How would I get this to work?