int redLed = 2;
int yellowLed = 3;
int greenLed = 4;
int pedestrianButton = 5;
int buttonState = 0;

void setup() {
  pinMode(redLed, OUTPUT);
    pinMode(yellowLed, OUTPUT);
      pinMode(greenLed, OUTPUT);
        pinMode(pedestrianButton, INPUT_PULLUP);

          Serial.begin(9600);
          }

          void loop() {
            buttonState = digitalRead(pedestrianButton);

              if (buttonState == HIGH) {
                  // Pedestrian button pressed
                      pedestrianMode();
                        } else {
                            // Normal traffic light operation
                                normalOperation();
                                  }
                                  }

                                  void changeColor(int red, int yellow, int green, int duration) {
                                    digitalWrite(redLed, red);
                                      digitalWrite(yellowLed, yellow);
                                        digitalWrite(greenLed, green);
                                          delay(duration * 1000);
                                          }

                                          void normalOperation() {
                                            changeColor(HIGH, LOW, LOW, 5);   // Red for 5 seconds
                                              changeColor(LOW, HIGH, LOW, 2);   // Yellow for 2 seconds
                                                changeColor(LOW, LOW, HIGH, 5);   // Green for 5 seconds
                                                }

                                                void pedestrianMode() {
                                                  // Pedestrian mode: Yellow for 1 second, Green for 5 seconds
                                                    changeColor(LOW, HIGH, LOW, 1);   // Yellow for 1 second
                                                      changeColor(LOW, LOW, HIGH, 5);   // Green for 5 seconds
                                                        normalOperation();  // Continue with normal traffic light operation
                                                        }