How to use flex

Question

I have set up a project with eventdemo.mxml as the primary
file and while that is open I have started an action script file
with the code below.
It is supposed to make a circle. How do I get it to make a
circle ?
I got this from "Basics of ActionScript 3.0 for Animation" by
Keith Peters. . It tells me to just complile and run the code but
there must be another step because all I get is a blank page, no
errors. I tried adding
var test=new eventdemo; but it still does nothing. What am I
missing. Something VERY basic I am sure. Sure would be nice if the
book I paid 40$ for would tell me.
// ActionScript file
package {
import flash.display.Sprite;
import flash.events.MouseEvent;
public class EventDemo extends Sprite {
private var eventSprite:Sprite;
public function EventDemo() {
init();
private function init():void {
eventSprite = new Sprite();
addChild(eventSprite);
eventSprite.graphics.beginFill(0xff0000);
eventSprite.graphics.drawCircle(0, 0, 100);
eventSprite.graphics.endFill();
eventSprite.x = stage.stageWidth / 2;
eventSprite.y = stage.stageHeight / 2;
eventSprite.addEventListener(MouseEvent.MOUSE_DOWN,
onMouseDown);
eventSprite.addEventListener(MouseEvent.MOUSE_UP,
onMouseUp);
private function onMouseDown(event:MouseEvent):void {
trace("mouse down");
private function onMouseUp(event:MouseEvent):void {
trace("mouse up");

Answer 1

I guess the book isn't at fault after all. I had created a
flex project instead of an actionscript project.