Thanks!
Some extra info (which we should have made more clear): loops basically have a timer which ticks down. If that timer hits zero they disappear. (You'll see them fade out as they get close to zero.) But if you feed a loop the right shapes (the ones they beat in our weird version of tick-tack-toe) that timer gets extended. So if you set it up that a loop gets the shapes it needs it will stay alive. The puzzle is that you need other loops to feed it, and then you have to keep those alive as well...
Hope that helps. Thanks for playing!