// 22.11.4562 - Muhammad Guido Augusta

#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);

byte customChar1[] = {
  B00000,
  B00000,
  B00000,
  B00000,
  B00000,
  B00000,
  B00011,
  B00100
};

byte customChar2[] = {
  B00001,
  B00010,
  B00100,
  B00100,
  B01110,
  B01010,
  B11111,
  B01110
};

byte customChar3[] = {
  B10000,
  B01001,
  B00110,
  B00000,
  B00000,
  B00000,
  B11000,
  B00100
};

byte customChar4[] = {
  B01000,
  B10000,
  B10010,
  B10101,
  B10010,
  B10000,
  B01000,
  B00111
};

byte customChar5[] = {
  B00000,
  B00000,
  B00000,
  B00000,
  B00000,
  B01110,
  B10001,
  B00000
};

byte customChar6[] = {
  B00010,
  B00001,
  B10101,
  B00001,
  B10101,
  B00001,
  B00010,
  B11100
};

int sevenPins[] = {22,23,24,25,26,27,28,29};

const byte numbers[] = {
  B10011001, // 4
  B10010010, // 5
  B10000010, // 6
  B10100100, // 2
};

int i = 10;
int j = 0;
bool active = false;

void setup() {
  // put your setup code here, to run once:
  lcd.init();
  lcd.backlight();
  lcd.begin(16, 2);
  lcd.createChar(0, customChar1);
  lcd.createChar(1, customChar2);
  lcd.createChar(2, customChar3);
  lcd.createChar(3, customChar4);
  lcd.createChar(4, customChar5);
  lcd.createChar(5, customChar6);

  for(int i = 0; i<9; i++){
    pinMode(sevenPins[i], OUTPUT);
  }

  Serial.begin(9600);
  Serial.println("Responsi: Muhammad Guido Augusta");
}

void loop() {
  // put your main code here, to run repeatedly:

  if (Serial.available() > 0) {

    if (Serial.readStringUntil("begin")) {
      while (true) {
        for (int n = 0; n < 6; n++) {
          if (n < 3) {
            lcd.setCursor(n, 0);
            lcd.write(n);
          } else {
            lcd.setCursor(n - 3, 1);
            lcd.write(n);
          }

        }

        if (i > -1) {
          lcd.setCursor(4, 0);
          lcd.print("   ");
          lcd.setCursor(4, 0);
          lcd.print(i);
        } else {
          i = 10;
          lcd.setCursor(4, 0);
          lcd.print("   ");
          lcd.setCursor(4, 0);
          lcd.print(i);
        }

        if(j < 4){
          displayNumber(j);
        }else{
          j = 0;
          displayNumber(j);
        }

        if (i > -1) {
          Serial.print("Angka: ");
          Serial.println(i);
        } else {
          i = 10;
          Serial.print("Angka: ");
          Serial.println(i);
        }

        lcd.setCursor(4, 1);
        lcd.print("22.11.4562");


        i -= 1;
        j++;

        delay(1000);
      }
    }

  }

}

void displayNumber(int num) {
  for (int i = 0; i < 8; i++) {
    byte bit = bitRead(numbers[num], i);
    digitalWrite(sevenPins[i], bit);
  }
}