const int redPin = 13;
const int yellowPin = 12;
const int greenPin = 11;
const int pedRedPin = 10;
const int pedGreenPin = 9;
const int pedButtonPin = 2;

const int delayTime = 1000; 
const int pedDelayTime = 5000; 

bool pedestrianRequest = false;

void setup() {
  pinMode(redPin, OUTPUT);
  pinMode(yellowPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(pedRedPin, OUTPUT);
  pinMode(pedGreenPin, OUTPUT);
  pinMode(pedButtonPin, INPUT_PULLUP);
}

void loop() {
  
  digitalWrite(redPin, HIGH);
  digitalWrite(yellowPin, LOW);
  digitalWrite(greenPin, LOW);
  delay(delayTime);

  
  digitalWrite(redPin, HIGH);
  digitalWrite(yellowPin, HIGH);
  digitalWrite(greenPin, LOW);
  delay(delayTime / 2);

  
  digitalWrite(redPin, LOW);
  digitalWrite(yellowPin, LOW);
  digitalWrite(greenPin, HIGH);
  delay(delayTime);

 
  digitalWrite(redPin, LOW);
  digitalWrite(yellowPin, HIGH);
  digitalWrite(greenPin, LOW);
  delay(delayTime / 2);

  
  if (digitalRead(pedButtonPin) == LOW) {
    pedestrianRequest = true;
    delay(100); 
  }

  
  if (pedestrianRequest) {
    digitalWrite(pedRedPin, LOW);
    digitalWrite(pedGreenPin, HIGH);
    delay(pedDelayTime);
    digitalWrite(pedRedPin, HIGH);
    digitalWrite(pedGreenPin, LOW);
    pedestrianRequest = false;
  }
}