When I was young I Watch my grandmother Qt with other family member, They started on two sides, and worked toward the center. They were doing hand Qting, semilar to clam shell. They would work as far as they could reach. Stop and roll, they would fill in between to half circle, starting small half circle, the lines were the width of the needle, thoses half circles would get bigger and wider as they crawd out of the valley to make a mountain. Being young I was told to watch the young one. Which I did .But that was towards the cinter.