const int ledPin1 =  12;
const int ledPin2 =  11;
const int ledPin3 = 4;
int count = 0;
int buttonState = 0;
bool lastButtonState;
const int buttonPin = 2;
unsigned long previousMillis = 0;
const unsigned long interval = 50;

void setup() {
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  pinMode(buttonPin, INPUT);
  pinMode (ledPin3, OUTPUT) ;
}

void loop() {
  unsigned long currentMillis = millis();

  buttonState = digitalRead(buttonPin);
  if (buttonState == HIGH && lastButtonState == LOW) {
    lastButtonState = buttonState;
    count++;

  }
  else {
    lastButtonState = buttonState;
    digitalWrite(ledPin3, LOW);
    digitalWrite(ledPin1, LOW);
    digitalWrite(ledPin2, LOW);
  }

  if (count == 0) {
    digitalWrite(ledPin1, HIGH);
    digitalWrite(ledPin3, HIGH);

    if (currentMillis - previousMillis >= interval) {
      digitalWrite(ledPin3, LOW);
      previousMillis = currentMillis;
    }
  }

  if (count == 1) {
    digitalWrite(ledPin2, HIGH);
        digitalWrite(ledPin3, HIGH);

    if (currentMillis - previousMillis >= interval) {
      digitalWrite(ledPin3, LOW);
      previousMillis = currentMillis;
    }
  }


  if (count == 2) {
    (count = 0);
  }

  else {
    digitalWrite(ledPin1, LOW);
    digitalWrite(ledPin2, LOW);
    digitalWrite(ledPin3, LOW);
  }
}