var light_on = 0;
var pressed = 0;
function press_f(){
     // -- Turn the Light On
     if(key_f && pressed == 0 && light_on == 0){light_on = 1;pressed = 1;}

     // -- Turn the Light Off
     if(key_f && pressed == 0 && light_on == 1){light_on = 0;pressed = 1;}

     // -- Wait until release of key_f to allow pressed again
     if(key_f==0 && pressed == 1) {pressed = 0;}

     if(light_on == 1){
           ..//Do this
     }
     else{
           ..//Reset / stop countdown
     }
}
action flashlight(){
      while(1){
            press_f();
            wait(1);
      }
}