Adding a button press to void loop with other while conditions

[StefanL38]

The main thing to make code responsive all the time is to use only one loop.
And this loop is

void loop() itself

all looping is done by void loop
and all other things are done baised on loop() - looping

I assume that you wanted to keep the main-structure of the given code and add the button-press detecting. It can be done but it will be more complicated than learning
what I call most-outer-global-looping.

A for-loop or a while-loop does inside-local-looping. Which is the opposite of most-outer-global-looping

See this more graphical explanation

Explaining how to write NON-blocking all time responsive code

Hi Everybody, from time to time I enjoy writing tutorials in my kind and style. My intention is to make it easy to understand. Though I'm aware: of the fact that one way of explaining things is not the best way for everybody. that the best experts about easyness-to-understand are: beginners . I want to encourage especially beginners to ask whatever question comes to their mind. I will use these questions as suggestion to improve the tutorial to become even more easy to understand. The u…

best regards Stefan