not sure do i understand the question...but if you windering how a pedal works...
The pedal sits between the line between the guitar and amp. When you press the pedal (or switch) on, the pedal brings itself into the line and so the signal goes through the effect, and then to the amp. if you press it again, the signal simply goes to the amp without the effect of the pedal.
imagine a light switch. When the switch is off, there is no light in the room, even though there is electricity in the house. When it is on, there is light in the room (ie the effect is on)
You have turned my blood cold and bitter,beat my compassion black and blue.
Crawling on my belly, clearing out what could have been.
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