Place the white bead in the centre of zone one, just under where the smile should be.
Allow the bead to settle, then push up each side to create the ear and go back and push up the other side, sweeping my brush down the side & middle to smooth. Wipe my brush and go back in to the smile and tuck it in along the smile to creat a 'pocket' slightly under the smile. Tuck up to the ears too, I also sometimes sweep the smile too.
Place zone 2 bead just above the smile and press out to sides, keeping it thin towards the sides and then pull it down with my brush, creating the 'pocket' allows the pink to butt up to the white and not go over it too much.