A nine patch is one of the most basic quilting blocks. At it's most basic, it is nine different squares of fabric sewn together to form a larger square. Patterns can be created with the 9 patch. Or ...

If you can sew a straight line on your sewing machine you can make a quilt. I am not claiming that quilting is completely non-complicated. It is as complicated as you want it to be or make it to be.