The first question was, how many generations before the glider recreates itself in the same
orientation, but one cell down and to the right?
We can see this just by
clicking Go 1, 2, 3, 4. So 4 was the correct answer.
And notice if you have the
Edit button clicked, you can
keep clicking Go and it skips
the step where it shows you
the green highlighted cells.
The second question is, what happens when two gliders in this pattern collide?
Let's see, let's just click
through it.
And you can see in five time steps,
they annihilate each other.