Making chain tracks

[mapper]

So how do you make those nice looking low poly chain tracks blizzard made on the tinker.
Help me out, step by step please cuz texturing is not my thing.

Thanx

 

[Mecheon]

Animated texture basically

They just make one that goes backwards

I used to know how to make them

 

[mapper]

Really helpfull but no one answerd my question yet.
Thanx for help