int redCar = 13; 
int yellowCar = 12; 
int greenCar = 11; 
int greenPed = 2;
int redPed = 3; 
int button = 7;
int crossTime = 2000;
unsigned long changeTime;
bool carGreenBlink = true;

void setup() {
  changeTime = millis();
  pinMode(redCar, OUTPUT);
  pinMode(yellowCar, OUTPUT);
  pinMode(greenCar, OUTPUT);
  pinMode(redPed, OUTPUT);
  pinMode(greenPed, OUTPUT);
  pinMode(button, INPUT);
  digitalWrite(greenCar, HIGH);
  digitalWrite(redPed, HIGH);
  digitalWrite(redCar, LOW);
  digitalWrite(yellowCar, LOW);
  digitalWrite(greenPed, LOW);
  Serial.begin(9600);
}

void loop() {
  if (carGreenBlink) {
    digitalWrite(greenCar, !digitalRead(greenCar));
    delay(500);
  }
  int state = digitalRead(button); 
  Serial.println(state);
  if (state == HIGH && (millis() - changeTime) > 5000) {
    changeLights();
  }
}

void changeLights() {
  digitalWrite(greenCar, LOW);
  digitalWrite(yellowCar, HIGH);
  delay(2000); 
  
  digitalWrite(yellowCar, LOW);
  digitalWrite(redCar, HIGH);

  digitalWrite(redPed, LOW);
  digitalWrite(greenPed, HIGH);
  delay(crossTime);
  
  for (int x = 0; x < 10; x++) {
    digitalWrite(greenPed, !digitalRead(greenPed));
    delay(500);
    digitalWrite(greenPed, !digitalRead(greenPed));
    delay(500);
  }

  digitalWrite(greenPed, LOW);
  digitalWrite(redCar, LOW);
  digitalWrite(redPed, HIGH);

  carGreenBlink = true;

  changeTime = millis();
}