EW - wallScript

using UnityEngine;
using System.Collections;

public class wallScipt : MonoBehaviour {

    public int hp = 15;
    float damageTick = 0f;
    public float damageInter = 0.4f;
    public GameObject self;
    public GameObject theUnitM;

    public void OnTriggerStay(Collider other)
    {
        if (other.tag == "emu")
        {
            damageTick += Time.deltaTime;
            if (damageTick > damageInter)
            {
                hp -= 1;
                if (hp < 1)
                {
                    other.GetComponent<emuScript>().Move();
                    theUnitM.GetComponent<unitManager>().UpdateGrid(self.transform.position);
                    Destroy(self);
                }
                damageTick = 0f;
            }
        }
    }
}