Initial. Added files

Assets/Scripts/Pickups/PickUpSpawner.cs

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+using System.Collections;
+using System.Collections.Generic;
+
+using UnityEngine;
+using Random = UnityEngine.Random;
+
+public class PickUpSpawner : MonoBehaviour
+{
+    private PickUpSpawner instance;
+    public PickUpSpawner Instance { get { return instance; } }
+
+    private List<GameObject> pickups;
+    [SerializeField] private GameObject healthPrefab;
+    [SerializeField] private GameObject armourPrefab;
+    [SerializeField] private GameObject ammoPrefab;
+
+    [SerializeField] private List<NavPoint> spawnPoints;
+
+    private void Start()
+    {
+        pickups = new List<GameObject>();
+        var amount = SettingsReader.Instance.GetSettings.pickupsAmount;
+        for (int i = 0; i < amount; i++)
+            pickups.Add(GameObject.Instantiate(healthPrefab, spawnPoints[Random.Range(0, spawnPoints.Count)].transform.position, Quaternion.identity));
+        for (int i = 0; i < amount; i++)
+            pickups.Add(GameObject.Instantiate(armourPrefab, spawnPoints[Random.Range(0, spawnPoints.Count)].transform.position, Quaternion.identity));
+        for (int i = 0; i < amount; i++)
+        {
+            pickups.Add(GameObject.Instantiate(ammoPrefab, spawnPoints[Random.Range(0, spawnPoints.Count)].transform.position, Quaternion.identity));
+        }
+        foreach (var gameobj in pickups)
+            gameobj.SetActive(true);
+
+        StartCoroutine(SpawnNewPickUps());
+    }
+
+    private IEnumerator SpawnNewPickUps()
+    {
+        while(true)
+        {
+            GameObject item;
+            if(IsDisableCheck(out item))
+            {
+                yield return new WaitForSeconds(3);
+                if (item != null)
+                {
+                    item.transform.position = spawnPoints[Random.Range(0, spawnPoints.Count)].position;
+                    item.SetActive(true);
+                }
+            }
+            yield return new  WaitForSeconds(2);
+        }
+    }
+
+    private bool IsDisableCheck(out GameObject gameobj)
+    {
+        foreach(var pick in pickups)
+        {
+            if (!pick.activeInHierarchy)
+            {
+                gameobj = pick;
+                return true;
+            }
+        }
+        gameobj = null;
+        return false;
+    }
+}