If (Hit.collider.tag == "Enemy")
{  
   
}

ScriptName sn = GameObject.Find("GOname").GetComponent<ScriptName>();
sn.переменная = твоя переменная;

private var runOnce=true;
var a = 0;   

  function somefunction() {  
  if (runOnce){  
    a = 2.15;  
    runOnce = false;  
   }  
  print(a);  
  }  

  function fixedUpdate(){  
   somefunction();  
  }

using UnityEngine;
using System.Collections;

public class CameraRot : MonoBehaviour {

  // Use this for initialization
  void Start () {
   
  }
   
  // Update is called once per frame
  void Update () {
   if(transform.rotation.x >= 0 && transform.rotation.x <= 30)
    transform.RotateAroundLocal(new Vector3(90,0,0),90*Time.deltaTime * 0.001f);
   if(transform.rotation.x >= 30 && transform.rotation.x <= 60)
    transform.RotateAroundLocal(new Vector3(90,0,0),90*Time.deltaTime * 0.005f);
   if(transform.rotation.x >= 60 && transform.rotation.x <= 90)
    transform.RotateAroundLocal(new Vector3(90,0,0),90*Time.deltaTime * 0.001f);
   else
   {
    transform.RotateAroundLocal(new Vector3(90,0,0),90*Time.deltaTime * 0.001f);
   }

     
  }
}