int ARDUINO_LED = 2;
int ARDUINO_LED3 = 3;
int ARDUINO_LED4 = 4;
int ARDUINO_LED5 = 5;
int ARDUINO_LED6 = 6;

const int buttonPin = A0;
int currentPattern = 0;
bool buttonPressed = false;

void setup() {
  pinMode(ARDUINO_LED, OUTPUT);
  pinMode(ARDUINO_LED3, OUTPUT);
  pinMode(ARDUINO_LED4, OUTPUT);
  pinMode(ARDUINO_LED5, OUTPUT);
  pinMode(ARDUINO_LED6, OUTPUT);

  pinMode(buttonPin, INPUT_PULLUP);
}

void loop() {
  if (digitalRead(buttonPin) == LOW) {
    if (!buttonPressed) {
      buttonPressed = true;
      currentPattern = (currentPattern + 1) % 3;
      delay(200);
    }
  } else {
    buttonPressed = false;
  }

  switch (currentPattern) {
    case 0:
      blinkAll();
      break;
    case 1:
      blinkOneByOne();
      break;
    case 2:
      blinkPairs();
      break;
  }
}

void blinkAll() {
  digitalWrite(ARDUINO_LED, HIGH);
  digitalWrite(ARDUINO_LED3, HIGH);
  digitalWrite(ARDUINO_LED4, HIGH);
  digitalWrite(ARDUINO_LED5, HIGH);
  digitalWrite(ARDUINO_LED6, HIGH);
  delay(500);
  digitalWrite(ARDUINO_LED, LOW);
  digitalWrite(ARDUINO_LED3, LOW);
  digitalWrite(ARDUINO_LED4, LOW);
  digitalWrite(ARDUINO_LED5, LOW);
  digitalWrite(ARDUINO_LED6, LOW);
  delay(500);
}

void blinkOneByOne() {
  digitalWrite(ARDUINO_LED, HIGH);
  delay(500);
  digitalWrite(ARDUINO_LED, LOW);
  delay(500);

  digitalWrite(ARDUINO_LED3, HIGH);
  delay(500);
  digitalWrite(ARDUINO_LED3, LOW);
  delay(500);

  digitalWrite(ARDUINO_LED4, HIGH);
  delay(500);
  digitalWrite(ARDUINO_LED4, LOW);
  delay(500);

  digitalWrite(ARDUINO_LED5, HIGH);
  delay(500);
  digitalWrite(ARDUINO_LED5, LOW);
  delay(500);

  digitalWrite(ARDUINO_LED6, HIGH);
  delay(500);
  digitalWrite(ARDUINO_LED6, LOW);
  delay(500);
}

void blinkPairs() {
  digitalWrite(ARDUINO_LED, HIGH);
  digitalWrite(ARDUINO_LED3, HIGH);
  delay(500);
  digitalWrite(ARDUINO_LED, LOW);
  digitalWrite(ARDUINO_LED3, LOW);
  delay(500);

  digitalWrite(ARDUINO_LED3, HIGH);
  digitalWrite(ARDUINO_LED4, HIGH);
  delay(500);
  digitalWrite(ARDUINO_LED3, LOW);
  digitalWrite(ARDUINO_LED4, LOW);
  delay(500);

  digitalWrite(ARDUINO_LED4, HIGH);
  digitalWrite(ARDUINO_LED5, HIGH);
  delay(500);
  digitalWrite(ARDUINO_LED4, LOW);
  digitalWrite(ARDUINO_LED5, LOW);
  delay(500);

  digitalWrite(ARDUINO_LED5, HIGH);
  digitalWrite(ARDUINO_LED6, HIGH);
  delay(500);
  digitalWrite(ARDUINO_LED5, LOW);
  digitalWrite(ARDUINO_LED6, LOW);
  delay(500);
}