Assuming of course that it goes on forever. Which admittedly seems like what one is intended to think, but the graphic doesn't actually show or state that, and realistically, if actually given this scenario, it shouldn't, because eventually some limit will be encountered that makes it impossible for the problem to physically exist (like running out of people to tie to the tracks, running out of space for them, having such a large amount of stuff in one space that it undergoes gravitational collapse, the finite size of the observable universe making fitting an infinite dilemma impossible, etc.)