long cervena;


void setup() {
  pinMode(11, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(13, OUTPUT);
  pinMode(A5, INPUT_PULLUP);

}

 int counter = 0;
void loop() 
{
if (digitalRead(A5)==HIGH)
{



  if (millis() > cervena && counter == 0)
  {
    digitalWrite(11, LOW);
    digitalWrite(12, LOW);
  digitalWrite(13, HIGH);
  cervena = millis() + 500;
  counter++;
  }
  else if (millis() > cervena && counter == 1)
  {
   digitalWrite(13, LOW);
   digitalWrite(12, HIGH);
   digitalWrite(11, LOW);
   cervena = millis() + 500;
   counter++;

  }
  else if (millis() > cervena && counter == 2)
  {
   digitalWrite(13, LOW);
   digitalWrite(12, LOW);
   digitalWrite(11, HIGH);
   cervena = millis() + 500;
   counter++;

  }
  else if (millis() > cervena && counter == 3)
  {
   digitalWrite(13, LOW);
   digitalWrite(12, HIGH);
   digitalWrite(11, LOW);
   cervena = millis() + 500;
   counter = 0;

  }
}
else
{
  digitalWrite(13, LOW);
  digitalWrite(12, HIGH);
  digitalWrite(11, LOW);
}

}