This could help you understand.
http://www.allpeoplequilt.com/how-to...uilting-rulers
Are you quilting with a Longarm or with a regular sewing machine?
A video for a regular sewing machine.
https://www.bing.com/videos/search?q...5F2F&FORM=VIRE
If you Google, Quilting with rulers, you will get a lot of websites with information.