What is "Trigger once while true".

Hello, please, the condition "Trigger once while true".

It is the equivalent of this ?.

if (var == 0)

var = 1;

play_sound (...);

end

That is, once true, it no longer is rerun.

But ... when it will true again?.

As I can write "Trigger once while true" in programming code?

It would help me to understand it better.

trigger once while true, triggers the actions attached once while the conditions of the event are true..

If any of the conditions changes it isn't true anymore so after that it will trigger once again when all conditions return to true..

Ok I understand, thanks as always.