celica flamethowers

hey im new to this new thread thing, hi im damo i have a 1974 ta22 celica as just a muck around car im currently putting flamethrowers on it i have made a new exhaust (dont worry i checked for leaks seems to be none not bad for a first attempt) now i have wired up a coil to a switch and all that stuff but i want the spark plug to pulsate wat do i use to pulate the plug at around 10 times a second

cheers squidgymop

maybe a relay or something i dont know.