are you talking bout raking or actual sweeping.
I believe that raking is going down from say the E string to the G string
I believe sweeping is going down then back up. Although there are many diffrent sweeping patterns. And It would be more difficult if your sweeping and tapping.
All I can say is practice it and you'll get it. Now Im gonna go practice my sweeps until I can do what you're trying to accomplish.
