ColorChange.cs

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
public class ColorChange : MonoBehaviour{
public List<Color> colors ; 
public int currentColor ; 
public Renderer rend; 
public bool eyeControl ; 
void Awake() {
            rend = GetComponent<Renderer> ();

}
void Update() {


if (Input.GetKeyDown(KeyCode.C) ) 
            {
          
           if(!eyeControl ){   
            
            nextColor(); 
           }
            }

if (Input.GetKeyDown(KeyCode.I) ) 
            {

            if( eyeControl ){
         
            nextColor(); 

            }
            }
            


}

void nextColor () {

    try{
rend.material.color = colors[currentColor]; 
currentColor++; 

    } catch (Exception e){

       currentColor = 0 ;      
    }
//rend. colors[currentColor]; 


}

}