Coil a wire into a spiral
Cut rings off the spiral
Make the metal soft by heating them until they're red hot
Flatten the rings with a hammer until overlapping areas are flat
Heat the rings to red hot again to make them soft again and let them cool slowly
Punch a hole in the overlapping area of the rivet
Cut the rivets (cut off tiny pieces of wire)
Set the rivets. Set a rivet into the rivet hole. Align it to the centre. Squeeze the rivet with pliers.