My, my, my....aren't you the smart little "X"pert flaker?  You probably think quite highly of yourself now you are manipulating snowflakes like there's no tomorrow!  Quite rightly so too, most flakers will give up on Stage 3 because they can't "get" the Flake Flipping, but you and I know that Flake Flipping is child's play once you get the hang of it!

Stage 4 should be relatively easy for you now.  You will be "performing" a Double Nova and a Pinwheel Flake, which BOTH incorporate lines that move in opposite directions at the SAME TIME.  The Flake Flipping moves make this possible.  Also, you will make a Pulsar, which shows how to make "delays" in your flake's animation.  Have fun!
 

You are now a Master Flaker, capable of doing things that many others will see as "magic".  It's time to play with the Grid flakes, they'll even make YOU think you are performing magic triX!

Please proceed to Stage 5...