unity3d 不显示公有变量 timeLength 和nextLevel

#pragma strict

function Start () {

}

var timeLength:int =4 ;
var nextLevel:int=1 ;
private var myTime:int ;
function Update () {

myTime+=Time.deltaTime ;
if (myTime>timeLength)
Application.loadedLevel(nextLevel);

}

1、检查脚本有没有编译错误？2、变量前面加上public