Trim your cardstock to two pieces, measuring 4.5" x 9." Align one piece of cardstock horizontally on the scoring board and start scoring vertical lines every ½ inch.
Align the cardstock so that the top lefthand corner lines up with the bottom 2-inch mark. Score this line, and continue to score parallel lines every inch. Flip the cardstock 180 degrees and repeat.
Fold all of the scored lines (vertical and diagonal) to one side.
At the ½-inch mark from one edge, pinch all of the vertical lines inward so that the diagonal lines fold outward. (Tip: This may take some patience, be sure to use both hands to hold the cardstock while folding!)
Repeat steps 1-4 with the second piece of cardstock; attach the two pieces with double-sided tape.
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