#define BUTTON_PIN 25
#define BUTTON_PIN1 33

int led [] = {17,16,4,0,2,15};
int n = 6;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  pinMode(BUTTON_PIN1, INPUT_PULLUP);

  for(int i = 0 ; i < n; i++) {
    pinMode(led[i], OUTPUT);
    digitalWrite(led[i], LOW);
  }

}

void loop() {
  bool state = digitalRead(BUTTON_PIN);
  bool state1 = digitalRead(BUTTON_PIN1);
  static bool last = HIGH;
  static bool last1 = HIGH;

  if(last == HIGH && state == LOW) {
      for(int i = n/2 ; i >= 0 ; i--) {
      digitalWrite(led[i-1],HIGH);
      delay(100);
      digitalWrite(led[n-i+-1],HIGH);
      delay(100);
    }
  }
  else if (state == LOW ){
    for(int i = n/2 ; i >= 0 ; i--) {
      digitalWrite(led[i-1],LOW);
      delay(100);
      digitalWrite(led[n-i+-1],LOW);
      delay(100);
    }
  }
  last = state;

  int time = millis();
  if (last == HIGH && state1 == LOW && time - millis() >= 3) {
    for( int i = 0 ; i < n ; i++) {
      if(i%2==0) {
        digitalWrite(led[i], HIGH);
        delay(500);
      }
    }
    for( int i = 0 ; i < n ; i++) {
      if(i%2!=0) {
        digitalWrite(led[i], HIGH);
        delay(500);
      }
    }
  } else if (state1 == LOW && time - millis() >= 3 ) {
    for( int i = 0 ; i < n ; i++) {
      if(i%2==0) {
        digitalWrite(led[i], LOW);
        delay(500);
      }
    }
    for( int i = 0 ; i < n ; i++) {
      if(i%2!=0) {
        digitalWrite(led[i], LOW);
        delay(500);
      }
    }
  } 
  time = millis();
  last1 = state1;
  
}