How to Make a lattice edge on a card

This video features an image from Squizzlefly. The card is Spring suite 2. Use a regular A2 size card. Cut 8 1/2 x 5 1/2. Score in the middle. Go down another 1/2 inch and score. Take a ruler across the top of the fold. Make a pencil mark at every 1/4 inch. Should be 21 small hash marks. Measure down 1/4 inch on both sides. Go 1/2 inch in and make a dot every 1/2 inch. Go down 1/2 inch from the fold and make a dot every 1/2 inch. Make long-short, long-short cuts with the dots along the whole length of the fold. Take the first long strip and fold it over. Make it even with the edge. Slip it over and tuck it behind along the edge of the fold. Go to the the other end and continue the process. Cut off the last short piece on the right and glue it to the left end.