What Do You Do When Making Puff Pastry?

Puff pastry is a piece of dough with a little packet of butter in the middle. To make it into puff pastry, you repeat this move of rolling it out, folding it in. Now you have a square again, roll it out, fold it in. Y u usuall, refrigerate it in between moves. Wait, do i put a piece of butter in every tingt over, just basically the first time? I cant.