Make a movie appear after a task have finished

Hi all,
i have a pbs with loading movieclip, maybe i lack of some more script to make it more workable. hope your people here can advise me or help me.

i have two movie clip,
one is redball
another is whiteball.

i have code it tat when onclipevent red ball will slowly vanished.

onClipEvent(load){
value=10;
}
onClipEvent(enterFrame){
this._alpha -= value;
}

after its vanished, the white ball will be loaded and appear after the red ball disappear.

onClipEvent(load){
this.attachMovie(“whiteball”,“whiteballe”,1);
this.whiteball._alpha = 0;
}
onClipEvent(enterFrame){
if(redball.alpha == 0){
this.whiteball._alpha = 100;
}else{
this.whiteball._alpha = 0;
}
}

I have also attached the fla file incase your all don’t understand what i’m to say.

thxs ya