#define LED_PIN_1 11
#define LED_PIN_2 10
#define LED_PIN_3 9
#define LED_PIN_4 6
#define LED_PIN_5 5
#define LED_PIN_6 4

#define PUSH_PIN_1 12
#define PUSH_PIN_2 7
#define PUSH_PIN_3 3

#define BUZ_PIN 13

#define NUM_BUTTONS 3

int led[NUM_BUTTONS] = {LED_PIN_1, LED_PIN_2, LED_PIN_3};
int led2[NUM_BUTTONS] = {LED_PIN_4, LED_PIN_5, LED_PIN_6};
int push[NUM_BUTTONS] = {PUSH_PIN_1, PUSH_PIN_2, PUSH_PIN_3};

bool state[NUM_BUTTONS] = {false, false, false};
bool lastState[NUM_BUTTONS] = {true, true, true};
bool buttonReleased[NUM_BUTTONS] = {true, true, true};

void setup() {
  Serial.begin(9600);

  for (int i = 0; i < NUM_BUTTONS; i++) {
    pinMode(led[i], OUTPUT);
    pinMode(led2[i], OUTPUT);
    pinMode(push[i], INPUT_PULLUP);
  }

  pinMode(BUZ_PIN, OUTPUT);
}

void loop() {

  for (int i = 0; i < NUM_BUTTONS; i++) {
    if (digitalRead(push[i]) == LOW && buttonReleased[i]) {
      state[i] = !state[i];
      buttonReleased[i] = false;
    }
    else if (digitalRead(push[i]) == HIGH) {
      buttonReleased[i] = true;
    }

    if (state[i] != lastState[i]) {
      lastState[i] = state[i];
    }
  }

  if (state[0] == true) {
    for (int i = 0; i < 3; i++) {
      digitalWrite(led[i], HIGH);
      delay(300);
      digitalWrite(led[i], LOW);
    }
    delay(300);
    for (int i = 0; i < 3; i++) {
      digitalWrite(led[i], LOW);
    }
  }

  if (state[1] == true) {
    for (int i = 0; i < 3; i++) {
      tone(BUZ_PIN, 200 * (i + 1), 300);
      delay(300);
    }
    noTone(BUZ_PIN);
    delay(300);
  }

  if (state[2] == true) {
    for (int i = 0; i < 3; i++) {
      digitalWrite(led2[i], HIGH);
      delay(300);
      digitalWrite(led2[i], LOW);
    }
    delay(300);
    for (int i = 0; i < 3; i++) {
      digitalWrite(led2[i], LOW);
    }
  }
}