Does setting a default value for period count as a solution?

[Cat_D]

This was my first idea, though I suspect it isn’t strictly in the spirit of the challenge:

float cycles = Time.time / (period <= Mathf.Epsilon? 2f : period);

Of course, this comes with the drawback that the block could not be fully stopped simply by setting the period value, but it is one other possible way of handling the issue.

[Nina]

Thanks for sharing your solution!