O.K...one more time.
The cards are in groups of 3.
Card 1 is a blank(white)front with a red back.
Card 2 is the common (force) number card with a blue back.
Card 3 is regular card with a blank(white)back.
This will leave the deck when spread in the blank, blank configuration.
Obviously, you've purchased the trick. Next time go to your "My Penguin Magic" section and click the "Discuss" button there. Since it's a private forum for actual purchasers, you'll be able to get much more detail about any trick purchased.
If you go to the Scott Alexander video of your learn videos (the 2nd one...Rick Lax does the first one), go directly to the 5:20 time marker. Scott goes over the basics of the deck handling, including the initial setup.
Good luck!