draw handles in game view

Dear Unity users, I want to draw handles like arrows in game preview. I used this code but failed to see anything when run the game:

using UnityEditor;

using UnityEngine;

using System.Collections;

public class ArrowCap : MonoBehaviour {

 //float arrowSize  = 1.0f;
 //public GameObject target;
 
 void OnGUI () {
     Handles.color = Color.red;
     Handles.ArrowCap(0,transform.position,transform.rotation,100.0f);
     Handles.color = Color.green;
     Handles.ArrowCap(0, transform.position,transform.rotation,100.0f);        
     Handles.color = Color.blue;
     Handles.ArrowCap(0,transform.position,transform.rotation,100.0f);
 }

}