How to remove a clone of an object when going out of the scene (2d)?

Question

Unity

I started to study units and made a small semblance of a flappy bird.
And now the question is how to remove object clones (Pipes between which a bird flies), after they left the scene?

Answer 1

The simplest thing is to check by coordinates that the pipe is to the left of the bird, and remove it when the distance exceeds a certain threshold. The second option is to use Renderer.isVisible or Renderer.OnBecameInvisible to check if the pipe is on screen.