First, cut the chain to the wanted length for your bracelet.
Connect the chain so it's the shape of a bracelet (if you want to use a clasp here, you can).
Put the needle through an edge/corner of the puzzle piece (be careful not to stab yourself). Then move it around so it's loose and the hole is big enough to put the wire through.
Put the wire through the hole in the puzzle piece, making sure it fits. If the wire is tight, move it around until it's loose.
Cut a small piece of wire.
Make a loop with the wire. Make sure it's big enough to fit around the edge or the puzzle piece!
Put the loop on the puzzle piece.
Attach the loop and the puzzle piece onto the chain.
Make more puzzle pieces 'beads' and add them to the bracelet. Mine were each five chain links apart. Then you have your bracelet!