Ray Shoot

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Shoot : MonoBehaviour
{
    public float shootRate;
    float currentDelay = 0f;
    public float damage = 20f;
    void Start()
    {

    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetMouseButtonDown(0))
        {
            if (currentDelay <= 0)
            {
                shoot();
            }
        }
        if (currentDelay > 0)
        {
            currentDelay -= Time.deltaTime;
        }
    }

    void shoot()
    {
        Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
        RaycastHit hit;
        if (Physics.Raycast (ray, out hit, float.PositiveInfinity) )
        {
            GameObject obj = hit.collider.gameObject;
            Heal health = obj.GetComponent<Heal>();
            if(health)
            {
                health.DealDamage(damage);
            }
        }

        currentDelay = shootRate;
    }
}