Want to turn on a relay by connecting 2 wires

[LarryD]

Sort of.

Take a look at this example .

See if you can get the idea of what is happening:

State Machine and Timers, Medium level tutorial.

This sketch introduces the concepts of: macros structure enumeration BWD (Blink Without Delay timing) technique timers State Machine The purpose of this example is to integrate the above concepts into a sketch to see how they can be used to simplify coding and make that coding more efficient. An important feature is you can control your Timers. Under program control, Timers can be running, restarted and disabled. When it comes to the ‘State Machine’, you can see how the sketch’s current st…