Most of that circuit is hidden inside the walls. All you can see is a plug in a wall socket and a wire leading to the lamp. Many things cannot stay plugged into the wall like a lamp can. Things that can be moved around, like flashlights and cars, get their electrons from batteries. The small batteries in flashlights produce electrons every time the flashlights are on.
Car batteries are much large.
They must produce electrons for all electrical car parts like the horn, and the headlights whenever the car is running. But as long as the car is turned on, a special part called the generator is working to recharge the battery. A car battery can produce electrons for years before it must be replaced. Try turning the battery around in the circuit. Try it with the bulb holder too.