How to make a timer that loops with booleans?

I have 3 scripts: Melee script is a raycast that shoots 5 meters out and when it hits something it calls the gameObject's function "PickItemUp". The OrangeScript initiates the timer afterwards and "picks up" the orange. The OrangeSpawnerScript then starts a timer from 5 seconds and when it reaches 0 it spawns a new orange and should be able to loop. This is where I am having problems as when I first start the game the timer goes down and an orange spawns and I can "pick it up", but then afterwards the boolean that enables the timer does NOT enable itself again. I can MANUALLY set it to true through the inspector however, but my script won't do it by itself. Here are the scripts:

using UnityEngine; using System.Collections;

public class Melee : MonoBehaviour {

 public float maxDistance = 5.0F;
 
 void Update () 
 {
     if(Input.GetKeyDown(KeyCode.E))
 {
     RaycastHit hit;
     if(Physics.Raycast (transform.position, transform.TransformDirection(Vector3.forward), out hit))
     {
         float hitDistance = hit.distance;
         if(hitDistance < maxDistance)
         {
             hit.transform.SendMessage("PickUpItem", SendMessageOptions.DontRequireReceiver);
         }
     }
 }
 }

}

using UnityEngine; using System.Collections;

public class OrangeScript : MonoBehaviour {

 public OrangeSpawnerScript OSScript;
 
 public void PickUpItem ()
 {
     OSScript.Timer();
     Destroy(gameObject);
 }
 
 
 

}

using UnityEngine; using System.Collections;

public class OrangeSpawnerScript : MonoBehaviour {

 public Transform theOrange;
 public float timer = 5.0F;
 public bool timerEnabled;
 
 public void Timer ()
 {
     timerEnabled = true;
 }
 
 void Update ()
 {
     if(timerEnabled)
     {
         timer -= 1 * Time.deltaTime;
         if(timer <= 0)
         {
             Instantiate(theOrange, transform.position, transform.rotation);
             timerEnabled = false;
             timer = 5.0F;
         }
     }
 }
 

}

Thanks so much in advance :)