Pegs...seems like hundreds of 'em
I then painted over with Cyan emulsion i has laying about. leaving a stylish white bit showing. I then found some small of cuts of copper pipes, acquired when the mother in law had central heating fitter to her old council house. They were about 2 inches long so i cut them along and hammered them flat. Annealing cleaning then i drew some birds on them, cut them out and shaped them with my trusty small hammer. Sliped into the slot with trusty "super" glue the looked a treat, but did take much longer than i planned. This one was the very first.