formula 1 style rear brake light for Canadian models
 

Anybody installed a flashing rear formula 1 style brake light on their Canadian Z.
I want to do it but my Z has a rear fog light so I wonder if I could tap into the wiring without compromising the effectiveness of the fog light. Could it work when the fog light is turned "on". I'm not an electrician, just like to do that kind of mods, thanks for any inputs.