int red1 = 10;
int orange1 = 9;
int green1 = 8;

int red2 = 4;
int orange2 = 3;
int green2 = 2;

void setup() {
  pinMode(red1, OUTPUT);
  pinMode(orange1, OUTPUT);
  pinMode(green1, OUTPUT);

  pinMode(red2, OUTPUT);
  pinMode(orange2, OUTPUT);
  pinMode(green2, OUTPUT);
}

void loop() {
  changeLights();
  delay(2000);
}

void changeLights() {
  digitalWrite(green1, HIGH);
  digitalWrite(orange1, LOW);
  digitalWrite(red1, LOW);
  digitalWrite(green2, LOW);
  digitalWrite(orange2, LOW);
  digitalWrite(red2, HIGH);
  delay(500);

  flashing(green1);
  delay(500);

  digitalWrite(green1, LOW);
  digitalWrite(orange1, HIGH);
  delay(1000);

  digitalWrite(orange1, LOW);
  digitalWrite(red1, HIGH);
  digitalWrite(green2, HIGH);
  digitalWrite(red2, LOW);
  delay(1500);

  flashing(green2);
  delay(500);

  digitalWrite(green2, LOW);
  digitalWrite(orange2, HIGH);
  delay(1000);

  digitalWrite(orange2, LOW);
  digitalWrite(green1, HIGH);
  digitalWrite(red2, HIGH);
  digitalWrite(red1, LOW);
  delay(1500);
}

void flashing(int greenPin) {
  for (int i = 0; i < 5; i++) {
    digitalWrite(greenPin, HIGH);
    delay(250);
    digitalWrite(greenPin, LOW);
    delay(250);
  }
}