On My Tregger Stay and Play animation one shot

hi created a trigger and my player onMyTriggerStay play my game object animotion Play one shot how ?

enter code here

var silah_alma_trigger : GameObject ;

var kapak : GameObject ;

var hedef1 : GameObject;

var uyari_text : GUIText ;

function Start () {

    silah_alma_trigger.active = false ;
    uyari_text.text = " '1' '2' '3'  ile silahlar degistirebilirsiniz" ;

    yield WaitForSeconds (4) ;
    uyari_text.text = "" ;

}

function OnTriggerStay (deydi : Collider) {

        if (deydi.gameObject.tag == "Player" ) {
        kapak.gameObject.animation.CrossFade("poligon_kapak_acilis");
        yield WaitForSeconds (0.5) ;
        hedef1.gameObject.animation.Play ("hedef1_acilis")
    }   

}