I notice you are new here at the Quilting Board. Welcome! Can I assume you are also a new quilter?
A blanket is usually one layer of fabric.
A QUILT is made with a layer of BATTING between two layers of cotton (usually).
I assume you are making a QUILT, not a blanket, right?
Many people HAND quilt through all three layers, it's done all the time. So is machine quilting.
You can check google images for pictures of "machine quilting" for some design ideas.
https://www.google.com/search?site=&...71.Og2waNVaumc
Jan in VA