Open the popcorn box cutting file in Cricut Design Space.

Add white cardstock to the cutting mat, and follow the prompts in Cricut Design Space to add the scoring wheel tip, and the fine blade and cut out the white pieces. Remove the cut pieces from the mat, and set aside. Continue until all the white pieces are cut out, and then do the same to cut out the black pieces.

Fold the white pieces along the score lines to form the box, and glue it together with a glue stick.

Add the black decorative pieces to the box with a glue stick.