This is the first build

Assets/BlackMat.mat

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Assets/Enemy.cs

+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class Enemy : MonoBehaviour {
+
+    public float health = 50f;
+
+    public void TakeDamage (float amount)
+    {
+        health -= amount;
+        if (health <= 0f)
+        {
+            Die();
+        }
+    }
+
+    void Die()
+    {
+        Destroy(gameObject);
+    }
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Assets/GunScript.cs

+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class GunScript : MonoBehaviour {
+
+    public float damage = 10f;
+    public float range = 100f;
+    public float fireRate = 15f;
+
+    public Camera fpsCam;
+    public ParticleSystem muzzleFlash;
+
+    private float nextTimeToFire = 0f;
+
+	
+	// Update is called once per frame
+	void Update () {
+
+        if (Input.GetButton("Fire1") && Time.time >= nextTimeToFire)
+        {
+            nextTimeToFire = Time.time + 1f / fireRate;
+            Shoot();
+        }
+		
+	}
+    void Shoot()
+    {
+        muzzleFlash.Play();
+
+        RaycastHit hit;
+        if (Physics.Raycast(fpsCam.transform.position, fpsCam.transform.forward, out hit, range))
+        {
+            Debug.Log(hit.transform.name);
+
+            Enemy enemy = hit.transform.GetComponent<Enemy>();
+            if (enemy != null)
+            {
+                enemy.TakeDamage(damage);
+            }
+        }
+    }
+}

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