multiple single frequencies + timer

[Inth]

Hi
thank you so much for this
could you maybe suggest how to expand this project
with additional frequencies + timer for each of them
so I could run the program and the generator will

• generate 1st frequency for X minutes and then
• generate 2nd frequency for X minutes
• etc

any help would be greatly appreciated as I am a newbie :)
I managed to expand the mobile application with additional fields for frequencies and timers
but struggle with code a bit :P
Mat