turn signal??

i remember a long...long time ago when i didnt have a car, that there was a way to install a switch to speed up or slow down your turn signal...it was like a tutorial with pics and everything.... anyone know this site??? or does anyone know how to do it???? my turn signal is a little too slow for my taste, with the switch i remember that you can make them strobe or come close... any help would be nice :)