self._friends = self.actors.add_layer("friendly roaches", level=9)
self._items = self.actors.add_layer("items", level=9)
self._generators = self.actors.add_layer("enemy generators", level=8)
self._friends = self.actors.add_layer("friendly roaches", level=9)
self._items = self.actors.add_layer("items", level=9)
self._generators = self.actors.add_layer("enemy generators", level=8)