int signal1[] = {23, 21};
int signal2[] = {19, 5};
int signal3[] = {17, 4};
int state1;
int state2;
int state3;
int state4;
void setup()
 {
  for (int i = 0; i < 2; i++)
   {
    pinMode(signal1[i], OUTPUT);
    pinMode(signal2[i], OUTPUT);
    pinMode(signal3[i], OUTPUT);
  }
  pinMode(12, INPUT);
  pinMode(13, INPUT);
  pinMode(14, INPUT);
  pinMode(26, INPUT);
  }
void loop()
 {
  int redDelay = 5000;
  state1 = digitalRead(12);
  state2 = digitalRead(14);
  state3 = digitalRead(13);
  state4= digitalRead(26);
  if (state1 == HIGH)
  {
    digitalWrite(signal1[1], HIGH);
    digitalWrite(signal2[0], HIGH);
    digitalWrite(signal3[0], HIGH);
    digitalWrite(signal1[0], LOW);
    digitalWrite(signal3[1], LOW);
   }else
   {
      digitalWrite(signal1[1], LOW);
    digitalWrite(signal2[0], LOW);
    digitalWrite(signal3[0], LOW);
    digitalWrite(signal1[0], LOW);
    digitalWrite(signal3[1], LOW);
    }
   if (state2 == HIGH)
   {
    digitalWrite(signal1[1], LOW);
    digitalWrite(signal2[0], LOW);
    digitalWrite(signal3[0], LOW);
    digitalWrite(signal1[0], HIGH);
    digitalWrite(signal3[0], HIGH);
    digitalWrite(signal2[1], HIGH);
    digitalWrite(signal2[1], HIGH);
    }else
     {
      digitalWrite(signal1[1], LOW);
    digitalWrite(signal2[0], LOW);
    digitalWrite(signal3[0], LOW);
    digitalWrite(signal1[0], LOW);
    digitalWrite(signal3[0], LOW);
    digitalWrite(signal2[1], LOW);
    digitalWrite(signal2[1], LOW);
    }
   if (state3 == HIGH) 
   {
    digitalWrite(signal3[1], HIGH);
    digitalWrite(signal1[0], HIGH);
    digitalWrite(signal2[0], HIGH);
    digitalWrite(signal3[0], LOW);
    digitalWrite(signal2[1], LOW);
    digitalWrite(signal2[1], LOW);
  }
  else
   {
    digitalWrite(signal3[1], LOW);
    digitalWrite(signal1[0], LOW);
    digitalWrite(signal2[0], LOW);
    digitalWrite(signal3[0], LOW);
    digitalWrite(signal2[1], LOW);
    digitalWrite(signal2[1], LOW);
   }
    if (state4 == HIGH)
     {
    digitalWrite(signal1[1], HIGH);
    digitalWrite(signal3[0], HIGH);
    digitalWrite(signal3[1], LOW);
    digitalWrite(signal1[0], LOW);
    digitalWrite(signal2[0], HIGH);
    delay(redDelay);
    digitalWrite(signal1[1], LOW);
    digitalWrite(signal2[0], LOW);
    digitalWrite(signal3[0], LOW);
    digitalWrite(signal1[0], HIGH);
    digitalWrite(signal3[0], HIGH);
    digitalWrite(signal2[1], HIGH);
    digitalWrite(signal2[1], HIGH);
    delay(redDelay);
    digitalWrite(signal3[1], HIGH);
    digitalWrite(signal1[0], HIGH);
    digitalWrite(signal2[0], HIGH);
    digitalWrite(signal3[0], LOW);
    digitalWrite(signal2[1], LOW);
    digitalWrite(signal2[1], LOW);
    delay(redDelay);
    }
    else
    {
      digitalWrite(signal3[1], LOW);
      digitalWrite(signal3[0], LOW);
      digitalWrite(signal2[1], LOW);
      digitalWrite(signal2[0], LOW);
      digitalWrite(signal1[1],LOW);
      digitalWrite(signal1[0], LOW);
    }
}