Start black thread behind the eye and tie in a pair of silver bead-chain eyes with figure-eight wraps just behind the hook eye, these give the fly its diving/jigging action.
Run the thread to the bend and tie in a sparse black marabou tail about one shank-length long, then add 6-8 strands of silver holographic tinsel over it the same length.
Tie in a grizzle cock hackle by the tip at the bend, then tie in a length of gold Fritz chenille.
Wrap the gold Fritz forward in touching turns to just behind the bead-chain eyes and tie off; pick out the fibers.
Palmer the grizzle hackle forward in 4-5 open turns to behind the eyes, tie off and trim.
Figure-eight thread around the eyes, build a neat head, whip finish and cement.
Other versions
6 more in the app: BCFlyguys, Black, Fl., Pink, Sunburst, White.