Minimal AS3 project

Main.as

package
{
	import flash.display.*;
	
	[SWF(width = "640", height = "480")]
	public class Main extends Sprite
	{
	  public function Main ()
	  {
	    graphics.beginFill(0x000000);
	    graphics.drawCircle(320, 240, 100);
	    graphics.endFill();
	  }
	}
}