How to make a double dart Pattern on a skirt.

In this video I start with a single dart skirt block and I develop the double dart skirt block, from the basic skirt block. My ETSY BOUTIQUE : https://www.etsy.com/ca-fr/shop/TOOLF... My grading rulers; https://www.etsy.com/ca-fr/listing/58... NEW!!! My digital grading rulers, all 4 basic and more; https://www.etsy.com/ca-fr/listing/12... My blocks in PDF; https://www.etsy.com/ca-fr/listing/67... My plus size blocks in PDF; https://www.etsy.com/ca-fr/listing/65... Skirt pattern making; https://www.etsy.com/ca-fr/listing/65... My channel :    / montagnes2