Dividing a circle into five equal parts shouldn't present a large problem. I will frequently attach the paper pattern to the metal. A spray adhesive will work fine for this. The lines will become the folds that create the piece. I'm working 24 gauge copper. That's a 6 inch disk. Close up the folds. This will get us started. Note the related forms fron one of the pics. Note only the folds will be hammered. The valleys do not get hammered.