I was wondering if anyone can help me understand how exactly to create different Custom event listeners.

I don't have a specific case of an event but I want to learn just in general how it is done, so I can apply it where it is needed.

What I was looking to do, just incase some folks might need to know, was:

var position = 0;



for(var i = 0; i < 10; i++)

{

    position++;

    if((position + 1) % 4 == 0)

    {

        // do some functions

    }

}