Hi. I tryed creating cubes to scene (following code), but flash freeze on few seconds. I know that flash dont have thread, but how I can do it, that cubes will be displayed (continuosly) without freeze flash ? Thanks

viewport.scene.addChild(worldContainer);

You have to take care with long nested ‘for’. Even if you increase the script timeout delay, it seems you have a lot of loops for flash and the user won’t see anything on screen for a while, until the last ‘for’ is run.
Maybe group them in smaller groups or use a timer? or both?