Note before beginning - this technique is not for road racing,stunts or thrashing around like a mad bleeder - what it allows you to do is go long distances with very little fatigue, if any, even if you do not ride regularly - it takes a little thought,feels a little odd at first and yes it defies standard pedal thought to a certain degree - - try it for a while and give it a chance, you might just add it to your biking routine.
Also - this style is for flat terrain and mild gradient - when ya need to dig in, well, ya need to dig in - change your foot position if required.
Ok lets go.
Step 1: P1 - leg set up
Riding a Uni shows ya very quickly how important correct leg extension is - ride with a saddle set low and until your really good you'll wobble all over the place - now you might think this does not really matter on a bike but try riding with a low saddle and then a correctly set up one, nothing else, you'll see the difference quickly.
So first off - set up your saddle height so that when seated, at the bottom of your pedal stroke (see drg purple line) your leg is almost straight, just the slightest bend.
Try a good ride with a low saddle, then like this.