title: Can i manage single lines inside of a Sprite?
body: <p>I'm working on a drawing app and now there's one problem.
  There are few thousand lines, that have to be drawn, but i also need to clear them one by one somehow. Or maybe - clear a square region inside Sprite's graphics.
  For now i think about using array and push each line into new Sprite, so i can add this new sprites to parent. But this solution looks awful, cause new sprite object will be created for each line.
  Is there some way to manage lines without creation sprite for them?</p>