Object reference not set to an instance of an object

Hi,
I want get color of pixel from sprite. It's my code. What can I do?

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4.  
5. public class NewBehaviourScript : MonoBehaviour {
6.    Texture2D b;
7.     Sprite bin;
8.     void Start () {
9.  
10.         bin = Resources.Load("kosz", typeof(Sprite)) as Sprite;
11.         b = bin.texture;
12.         Color color = b.GetPixel(1, 1);
13.         Debug.Log(color);
14.     }
15.  
16.     // Update is called once per frame
17.     void Update () {
18.     }
19. }

I have error which reports me my variable is empty and I don't know why. My sprite I have in dir called "picture". I already tried "picture/kosz","picture/kosz.jpg", "kosz", "kosz.jpg". What I do wrong?

This is my error:

 

Is the "bin" Sprite linked to a GameObject in the editor? If not, try doing:

Code (CSharp):

1. bin = Instantiate(Resources.Load("kosz", typeof(Sprite))) as Sprite;

 

Hi,

the sprite HAVE to be in a folder called: Resources