void setup() 
{
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(12, OUTPUT);
  digitalWrite(2, HIGH);
  digitalWrite(10, HIGH);
}

void loop() 
{
  signal_1();
  signal_2();
}

void signal_1()
{
  if(digitalRead(10)==HIGH)
  {
    digitalWrite(2, LOW);
    digitalWrite(4, HIGH);
    delay(1200);
    digitalWrite(4, LOW);
    digitalWrite(3, HIGH);
    delay(1200);
    digitalWrite(3, LOW);
    for(int i=0; i<2; i++)
    {
      digitalWrite(2, HIGH);
      delay(500);
      digitalWrite(2, LOW);
      delay(500);
    }
    digitalWrite(2, HIGH);
  }
}

void signal_2()
{
  if(digitalRead(2)==HIGH)
  {
    digitalWrite(10, LOW);
    digitalWrite(12, HIGH);
    delay(1200);
    digitalWrite(12, LOW);
    digitalWrite(11, HIGH);
    delay(1200);
    digitalWrite(11, LOW);
    for(int i=0; i<2; i++)
    {
      digitalWrite(10, HIGH);
      delay(500);
      digitalWrite(10, LOW);
      delay(500);
    }
    digitalWrite(10, HIGH);
  }
}