Write an article based on this "Separate your papers, if necessary. Fold out the flaps of your white papers. Insert the flap into the pocket. Free the other white flap. Invert the paper so the top triangle faces downward. Connect your ends together."
If you have been folding your sheets individually, you won't need to separate your papers, but if you have been folding six at a time, you'll need to separate these to move forward. Stack your finished, folded papers into like piles, one with the colored side out and the other with the white side out. Be sure your colors correspond between piles. If the first color of your colored pile is red, the first color of your white pile should also be red (on the inside). You should fold the top triangular part of your paper along its base so that the triangles face outward to form wings. These will be inserted into your colored papers. To find the pocket on your colored paper, slightly open the outer flaps of paper on the "legs." This is the pocket into which you will insert the white flap of your other paper. You will also need to:  Using your right hand, hold together the outer flaps on the legs of one side of your white paper. Then fold down the top triangle part so that it forms a flap that you can insert into the pocket of the colored paper. Once you have successfully inserted your white flap into the colored pocket, open the "legs" that you've been holding together with your right hand on the other side to expose the other flap. Now you can fit the second flap into your next piece of colored paper.  Lock your white and colored papers together until all 12 pieces are connected. The bottoms of your linked pieces of paper should be even. Now you can fold the right two flaps of your outermost white paper to reveal the next paper in the series, which should be colored. Then fold the top of your paper down so that the flat top edge is even with the base of the now inverted triangular shape.  This should form the same left and right outward pointing triangles that you folded when  you creased your lock folds. Fold all of your lock creases for each paper, starting from one end and skipping the end white paper. You should spread out your now connected and locked together papers to make connecting the ends easier. Put the end white papers final flap into the pocket of the colored paper at the other end of your paper chain.  Close the two outer locks by rotating the paper so that the inside is facing outward. Once you have locked all the individual parts of your firework together and have rotated the inside out, your firework should be complete.