Thread six large (12mm) beads onto the wire.
Slide them so that they are at the centre of the wire.
Take the right end of the wire and thread it left to right through the leftmost bead on the wire.
Pull the ends of the wire so that the beads form a circle. This is the centre of the snowflake.
The two ends of the wire should come out on either side of one of the beads.
The next bit can get confusing, so I'll call the end on the left "end A" and the end on the right, "end B".