I worked a long time on figuring out how to move the arms over a much greater arc that is up and down and make them a lot easier, so that you didn't have to use a button.

Zoe Five. LG Yeah I will reverse it face up here.

If I drop the card face up, like this, you reverse it. Zoe OK.

The natural numbers 0, 1, 2, 3, and so on begin with 0 and continue upwards, so that every number has a successor.