title: AS3: determine positions of inserted instances of movie clip
body: <p>if i insert multiple instances of movie clip with addChild method and "for" loop, how can i determine exact x, y position of instances in the scene? Either specific x y for each instance or placing the instances next to each other with specified space between them. Let's say 40px width squares with 20px space between them.
  many thanks for any advices </p>