Set bool to different objects with 1 script

Hello i readed all google pages and everything i could find but nothing helped me so i have to ask here: i made a script attached to 100 cubes it says

 using UnityEngine;
 using System.Collections;
 
 public class IfClose : MonoBehaviour {
     public bool Gravitronned= false;
     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void Update () {
     
     }
 
     void OnTriggerEnter (Collider col)
     {
         if (col.gameObject.name == "IfInScreenGrv") {
             Gravitronned = true;
 
         }
         else 
         {
         Gravitronned = false;
         }
     }
 }

and then i have another script that says

 using UnityEngine;
 using System.Collections;
 
 public class TimeFreeze : MonoBehaviour {
     static bool GravitronedTwice;
 
     // Use this for initialization
     void Start () {
     
     }
     
     void Update ()
     {
         GravitronedTwice = gameObject.GetComponent<IfClose> ().Gravitronned;
                       if (GravitronedTwice = true) {
                     if (Input.GetKeyDown (KeyCode.V)) {
                         Physics.gravity = new Vector3 (0, 3.0F, 0);
 
 
                      }
                }
 }
 }

so when i press V i want the cube only in this area to get Physics.gravity = new Vector3 (0, 3.0F, 0); [1]: /storage/temp/47667-yesssssssssssssss.png others stay ass they are ![alt text][1]