Changing gameobjects Float from another script?

Ive been trying to change the float in my player objects script,

from another object shooting a raycast, but every time the player

makes contact with the raycast the target value doesnt change. So I added Debug log to show current health float on my enemies

script, the value does decrease but it instantly snaps back to the

default value. I'm relitively new to coding and I would prefer using C#, some how

its esier for me to understand than Unity's javascript.

Heres my script for ememy..

   using UnityEngine;
 using System.Collections;
 
 public class enemy_detect : MonoBehaviour {
 
     public float scensorreach = 3f; 
     public float damage;
     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void Update () {
 
         GameObject controller = GameObject.Find ("Player");
         Health HP = controller.GetComponent <Health> ();
         float currenthealth = HP.health; 
 
         Vector3 scensorrenderFwd = transform.TransformDirection(Vector3.right) * scensorreach;
         Debug.DrawRay (transform.position, scensorrenderFwd, Color.red);
         ///___________________________________///
         
         Vector3 scensordetectfwd = transform.TransformDirection (Vector3.right);
         bool scensorfwd = Physics.Raycast (transform.position, scensordetectfwd, scensorreach);
         if (scensorfwd) {
                         currenthealth += -1;
                         if (currenthealth < 100)
                                 damage += 1 * Time.deltaTime;
                         if (currenthealth == 0)
                                 Destroy (controller);
                 }
         Debug.Log (damage);
         Debug.Log (currenthealth);
     }
 }

   

And heres the player script with the health value Im trying to change,

   using UnityEngine;
     using System.Collections;
     
     public class Health : MonoBehaviour{
     
         public float health = 100;
     
         private float Width = Screen.width;
         private float Height = Screen.height;
     
         void Start() {
         } 
     
         void Update() {
         }
     
         void OnGUI() {
     
         GUI.Box(new Rect(Width/2 - health * 2, 10, health * 4, 
 
 20),"HP " + health);
     
         }
     }

does anyone have any idea whats wrong with the script