我不断得到一个脚本上的错误，我正在编程的脚本工作，但我想修复错误

我一直在分数计数器脚本上得到这个错误，我正在制作分数计数器工作，但这个错误只是令人讨厌，我不想发布它与错误堆积。

NullReferenceException: Object reference not set to an instance of an object
ScoreCounter.Update () (at Assets/ScoreCounter.cs:26)

脚本:

using UnityEngine;
using UnityEngine.UI;
using System.Collections;
public class ScoreCounter : MonoBehaviour
{
public static int score;        // The player's score.

public Text text;                      // Reference to the Text component.
void Start ()
{
    // Set up the reference.
    //text = GetComponent <Text> ();
    // Reset the score.
    score = 0;
}

void Update ()
{
    // Set the displayed text to be the word "Score" followed by the score value.
    text.text = "Score:" + score;
}
}