Variable rapidfire audio circuit guitar


New Member
Hello I'm new here, and I was wondering if there was any possible way to have to have a dead slow to a constant flow speed on a variable resistor 555 rapid fire that can be used in a preferably passive or 9v audio circuit for an electric guitar, that allows the live wire to be connected to the ground.
I've tried finding a schematic for three weeks now but since it's just such an odd idea no one has done it yet. It's for what they call a kill switch it connects and disconnects the ground to the live via switcth. my cousin wants me to build it for him so he can "Set it and forget it" and I've only put rapid fire in about three controllers and I'm kind of new to ic's.
Any suggestions schematic ideas anything would be greatly appreciated. Thank you,