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You only have 1 variable in your control, the time in-between follows. (I say this because there is no notification for "unfollowing" someone)

You need to represent 2 variables : the dot/dash to represent symbols, and the dit, the time in-between symbols.

If you want to do this you need some sort of 2nd action, a comment or a twitter like, that way we could represent the dot/dash with either action, and then space them out to time the silence.

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Well, you can use tap code: https://en.wikipedia.org/wiki/Tap_code

Or you can use "Morse tap code" where two close knocks represent a dot, and if the gap between them is slightly longer it's a dash. That takes two knocks for one dot/dash but it works and is (was?) used in practice.

Yes JofArnolds response is similar where you just switch a flag on/off to draw dots and dashes and dits

It seems it can be done using a few different components, even if not directly by “following”, thank you

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