Time tunnel

When I was a kid there was a tv show called The Time Tunnel. I remember two things about it: one, that I was so enthralled by it I never missed an episode, and two, that the tunnel was a black and white swirly thing and they used to run down it. Of course this is not a time tunnel; it’s a recycled paper bag. And it has twofold appeal: first, it came my way via my friend via New York, and second, the use of the letter ‘a’ in a black and white swirly thing.