Tell us about yourself!
FYI you can get a 30/60/90 triangle anywhere they sell protractors (especially around school supply time). You may already have one if you ever took a geometry class! This makes the folding in thirds part really simple. I make snowflakes every December while my students take their finals. As they finish, I show them how. It keeps them quiet while others are working.
if you want it bad enough to copy it, why not pay for it? These sites don't stay in business without some paying customers