I am trying to program a PIR motion sensor that will sense motion and turn on a piezo buzzer and LED light that are all connected on a Parallax Propeller. The code is written in C and used on Simple IDE. The code works to where the motion is sensed and turns on the buzzer and LED but I can't turn it off unless I unplug the circuit. I was thinking of adding a push button that will turn it off and reset it to the previous state. Any advice?