紅綠燈：

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using UnityEngine;

using System.Collections;

using UnityEngine.UI;

public class counter : MonoBehaviour {

int num;

double fMyWaitTime=2.0;

double WaitTimecount=0;

// Use this for initialization

void Start () {

num = 0;

}

// Update is called once per frame

void Update () {

Text mytxt=GameObject.Find("Text").GetComponent<Text>();

num = num + 1;

int countnum = num % 3;

mytxt.text =countnum.ToString();

WaitTimecount=0;

mywait ();

if (countnum==0)

{

Image img = GameObject.Find ("Image").GetComponent<Image> ();

img.color = new Color(1.0F, 0.0F, 0.0F, 1.0F); // (紅red,綠green,藍blue,透明)

}

else

{

Image img = GameObject.Find ("Image").GetComponent<Image> ();

img.color = new Color(0.0F, 0.0F, 0.0F, 1.0F); // (紅red,綠green,藍blue,透明)

}

if (countnum==1)

{

Image img1 = GameObject.Find ("Image1").GetComponent<Image> ();

img1.color = new Color(1.0F, 0.92F, 0.016F, 1.0F); // (紅red,綠green,藍blue,透明)

}

else

{

Image img1 = GameObject.Find ("Image1").GetComponent<Image> ();

img1.color = new Color(0.0F, 0.0F, 0.0F, 1.0F); // (紅red,綠green,藍blue,透明)

}

if (countnum==2)

{

Image img2 = GameObject.Find ("Image2").GetComponent<Image> ();

img2.color = new Color(0.0F, 1.0F, 0.0F, 1.0F); // (紅red,綠green,藍blue,透明)

}

else

{

Image img2 = GameObject.Find ("Image2").GetComponent<Image> ();

img2.color = new Color(0.0F, 0.0F, 0.0F, 1.0F); // (紅red,綠green,藍blue,透明)

}

}

void mywait()

{

while (WaitTimecount <= fMyWaitTime) {

//do stuff;

WaitTimecount = WaitTimecount + 0.01;

Debug.Log ( WaitTimecount );

} 

}

}