Optimizing my dynamic background engine for a 2d flash game in actionscript-3

Question

Edit 2: judging on the lack of replies I start wondering if my issue is clear enough. Please tell me if I need to elaborate more.

Notice: see bottom for a co

Answer 1

What if instead of destroying background squares you just put them in a pile of "ready to go" squares that you can draw on, capping it at like 4? then you don't have to create one when you need one you just move it into the right spot and maybe shuffle the stars or something.

[would add example but i don't write AS3 code :(]