Flying boxes part 2

ok guys ive worked on this flash animation all made by actionsript now that everything comes inside how can i let it go out? i mean make another animation so it goes off to the other side. Shold i use code? or tween?

previe:
http://www.chfansite.altervista.org/index2prova.html

here the fla:
http://chfansite.altervista.org/index2prova.fla

if the link dont work just copy and paste in ur adress bar thanks in advance