On Press
Our master controls both the electrical system as the engine (our slave button). When we press the button and the electrical system is ON then we turn OFF both the master and the slave. The master button enforces the slave to be turned off.
On Event
Our events just change the visuals of the master button. Nothing new here.
On Press
Our slave turns of the engine. But since it is the slave, we also added that it can only be turned ON if the electrical state is also ON (the state of our master button)
On Event
Our events just change the visuals of the master button. Nothing new here.