#include <LiquidCrystal_I2C.h>
#include <Keypad.h>
LiquidCrystal_I2C lcd (0x27, 6, 2);
const byte r = 4;
const byte c = 4;
byte rp[r] = {5, 4, 3, 2};
byte rc[c] = {A3, A2, A1, A0};
byte cc=0;
char keys[r][c] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'.', '0', '=', 'D'}
};
Keypad keypad = Keypad(makeKeymap(keys), rp, rc, r, c);

// make some custom characters:
byte heart[8] = {
  0b00000,
  0b01010,
  0b11111,
  0b11111,
  0b11111,
  0b01110,
  0b00100,
  0b00000
};

byte smiley[8] = {
  0b00000,
  0b00000,
  0b01010,
  0b00000,
  0b00000,
  0b10001,
  0b01110,
  0b00000
};

byte frownie[8] = {
  0b00000,
  0b00000,
  0b01010,
  0b00000,
  0b00000,
  0b00000,
  0b01110,
  0b10001
};

byte armsDown[8] = {
  0b00100,
  0b01010,
  0b00100,
  0b00100,
  0b01110,
  0b10101,
  0b00100,
  0b01010
};

byte armsUp[8] = {
  0b00100,
  0b01010,
  0b00100,
  0b10101,
  0b01110,
  0b00100,
  0b00100,
  0b01010
};

void setup() {
  lcd.begin(16,2);
  lcd.setCursor(1,0);
  lcd.init();
  lcd.backlight();
  // create a new character
  lcd.createChar(0, heart);
  lcd.createChar(1, smiley);
  lcd.createChar(2, frownie);
  lcd.createChar(3, armsDown);
  lcd.createChar(4, armsUp);
}

void loop() {
  int sensorReading = analogRead(A4);
  char key = keypad.getKey();
  if (key == '1') {
    lcd.setCursor(0,0);
    lcd.clear();
    lcd.print("Aldo");
    lcd.write(byte(4));
    lcd.setCursor(0,1);
    lcd.print("Quinsha");
    lcd.write(byte(1));
  }
  else if (key == '2') {
    lcd.setCursor(0,0);
    lcd.clear();
    lcd.print("Aaron");
    lcd.write(byte(2));
    lcd.setCursor(0,1);
    lcd.print("Kulbert");
    lcd.write(byte(3));
  }
  else if (key == '3') {
    lcd.setCursor(0,0);
    lcd.clear();
    lcd.print("Yitro");
    lcd.write(byte(4));
    lcd.setCursor(0,1);
    lcd.print("Valentina");
    lcd.write(byte(0));
  }
  else if (key == '4') {
    lcd.setCursor(0,0);
    lcd.clear();
    lcd.write(byte(3));
    lcd.write(byte(0));
    lcd.write(byte(4));
    for (int i = 0 ; i < 16; i++) {
      lcd.scrollDisplayRight();
      delay(150);
    }
  }
  else if (key == '0') {
    lcd.setCursor(0,0);
    lcd.clear();
  }
}