Boy and Dog walking cycle

As you know, most of animators assignments are filled with walk cycles. Quadrupeds are always the tough ones. But all thing you're gonna need is coming up with a formula based on the references you around you.
In this video I was assigned to animate a human character with a four legged animal on a leash with the different timings without changing their distance from each other with the background in a loop. It sounds like a easy job but Nooooo...it was not. It took times to find a right loop for that scene. But It was worth it.