How the create an event handler similar to Bangle.on("step"...........)

Based on the tip from @d3nd3-o0 I changed the example in message #1 to:

var eventEmitter = new Object();

//Create an event handler:
var myEventHandler = function () {
  console.log('I hear a scream!');
};

//Assign the event handler to an event:
eventEmitter.on('scream', myEventHandler);

//Fire the 'scream' event:
eventEmitter.emit('scream');

The result:
I hear a scream!

So that works!

So, there is no need in Espruino to require an events module, instead you just create an object, and use that as event emitter.

Thanks to @d3nd3-o0 for guiding me in the right direction!