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// Let’s import Tweening Libraries
// This enables Tweeing Capabilities
import fl.transitions.Tween;
import fl.transitions.easing.* // This will import all
//easing capabilities

// Variables to hold the tween
var inTween:Tween;
var outTween:Tween;

//Now we will set the compiler
//to wait the buttons to be clicked
in_btn.addEventListener(MouseEvent.CLICK, fadeIn);
out_btn.addEventListener(MouseEvent.CLICK, fadeOut);
// Note the instance names have to be identical
// to the names we gave on stage

//Functions
//if any event listener has a function that is not declared
// a error message shows, even if the button is not clicked

function fadeIn(event:MouseEvent):void{

inTween = new Tween (sun_mc,”alpha”,None.easeNone,0,1,3,true);
// sun_mc is the instance name we gave on stage
// alpha is a string HAS to be in between quotes
// The opacitiy starts at 0 increasing all the way to 3, steady
// during 3 seconds
// the true is to state we are using seconds and not milliseconds
}

function fadeOut(event:MouseEvent):void{

inTween = new Tween (sun_mc,”alpha”,None.easeNone,1,0,3,true);
}

// Don’t forget to subscribe
//thanks for watching