high beam flasher

I would like to install a switch w/ a flasher that would let me flash the high beams, whether the lights are on or off.

The veicle is a 2005 E-350 Diesel w/ duel alt. and duel batterys.

Thanks for any help.

Here is link for a  diagram that makes an alternating effect on your high beams or  fog lights. It works wether your lights are on or off. 

http://pg.photos.yahoo.com/ph/kreativesailor/detail?.dir=/374b&.dnm=d372.jpg&.src=ph

I couldn't post the picture here because the picture is little bigger than what's allowed. If you can't see the picture that well on this link giving please email me and I'll go ahead and email the big quality picture to you.

Thank you for the replys

For the leagal side of it, I would like to make the high beams flash together as if I was wanting to pass someone.

The other thing is that I have 2 hella 210 foglights that I want to each have there own flasher or wig-wam I must beable to use them on solid also. Anyone can have a flashing yellow/amber at anytime in NY anyway. 

The same for 2 hella 210 driving lights. Maybe the driving light to be able to use them independitly of each other. set up in a pigen toe fashen to help find the radar cops