I want to set a Timer which acting like this: fire at 4 sec, fire at 15 sec, fire at 19 sec, then all repeat again, which means another 4 sec, 15 sec, 19 sec sequence again.
I found related topics to this:
Set a timer with variable intervals in swift
Swift Timers in Loop all fire at the same time instead of sequentially
but I still can't make them to fit my need.
Any suggestions appreciated.