More complex traffic light system

To look deeper into the code I found myself looking at a more complex system, below shows the same setup as before but this is the direction I took somewhat in the end. As you can see it adds a bit of interactability to create a pedestrian crossing system. Arduino_Traffic_Light_With_Button-1.png

To start I simply need to add in a variable to the start along with the LED names.

-int button = 12

Next is to add a setup function to add a new line, this will make the switch an input.

-pinMode (button, INPUT);

-digitalWrite(green, HIGH);

For this change, I would have to switch around the loop code to the following.

void loop() {
    if (digitalRead(button) == HIGH){
        delay(15); // software debounce
        if (digitalRead(button) == HIGH) {
            // if the switch is HIGH, ie. pushed down - change the lights!
            changeLights();
            delay(15000); // wait for 15 seconds
        }
    }
}
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