Personal preference but headlights should be a slow and consistent 60FPM for distance warning then shut down once stopped. Tail lights should only do their assigned OEM functions. With the intensity of LEDs nowadays there is little to nothing to be gained once you've installed a lightbar, rear stick, and/or heads on the license plate. If a driver doesn't get the point with that amount of warning, repurposing the OEM lighting isn't going to save you.