#include <LiquidCrystal_I2C.h>

int pushButtonGreen = 2;
int pushButtonBlue = 3;
int pushButtonYellow = 4;
int pushButtonRed = 5;
int pushButtonGray = 6;
int pushButtonWhite = 7;
int pushButtonBlack = 8;

int buttonStateGreen,
buttonStateBlue,
buttonStateYellow,
buttonStateRed,
buttonStateGray,
buttonStateWhite,
buttonStateBlack  = LOW;

int lastButtonStateGreen,
lastButtonStateBlue,
lastButtonStateYellow,
lastButtonStateRed,
lastButtonStateGray,
lastButtonStateWhite,
lastButtonStateBlack = LOW;

bool backlightOn = true;

LiquidCrystal_I2C lcd(0x27,16,2);

void setup() {
  Serial.begin(9600);
  pinMode(pushButtonGreen, INPUT);
  pinMode(pushButtonBlue, INPUT);
  pinMode(pushButtonYellow, INPUT);
  pinMode(pushButtonRed, INPUT);
  pinMode(pushButtonGray, INPUT);
  pinMode(pushButtonWhite, INPUT);
  pinMode(pushButtonBlack, INPUT);
}

void loop() {
    buttonStateGreen = digitalRead(pushButtonGreen);
    buttonStateBlue = digitalRead(pushButtonBlue);
    buttonStateYellow = digitalRead(pushButtonYellow);
    buttonStateRed = digitalRead(pushButtonRed);
    buttonStateGray = digitalRead(pushButtonGray);
    buttonStateWhite = digitalRead(pushButtonWhite);
    buttonStateBlack = digitalRead(pushButtonBlack);

  if (buttonStateGreen != lastButtonStateGreen) {
    lcd.clear();
    lcd.setCursor(3,0);
    lcd.print("JV");
    lcd.setCursor(5,1);
    lcd.print("Teodosio");

    lastButtonStateGreen = buttonStateGreen;
    delay(50);;
  }
  else if (buttonStateBlue != lastButtonStateBlue) {
    lcd.clear();
    lcd.setCursor(3,0);
    lcd.print("Hanna");
    lcd.setCursor(6,1);
    lcd.print("Salazar");

    lastButtonStateBlue = buttonStateBlue;
    delay(50);
  }
  else if (buttonStateYellow != lastButtonStateYellow) {
    lcd.clear();
    lcd.setCursor(3,0);
    lcd.print("Keneth");
    lcd.setCursor(8,1);
    lcd.print("Sarto");

    lastButtonStateYellow = buttonStateYellow;
    delay(50);
  }
  else if (buttonStateRed != lastButtonStateRed) {
    lcd.clear();
    lcd.setCursor(3,0);
    lcd.print("Allaine");
    lcd.setCursor(7,1);
    lcd.print("Villas");

    lastButtonStateRed = buttonStateRed;
    delay(50);
  }
  else if (buttonStateGray != lastButtonStateGray) {
    lcd.clear();
    lcd.setCursor(3,0);
    lcd.print("Famela");
    lcd.setCursor(7,1);
    lcd.print("Ortega");

    lastButtonStateGray = buttonStateGray;
    delay(50);
  }
  else if (buttonStateWhite != lastButtonStateWhite) {
    lcd.clear();

    lastButtonStateWhite = buttonStateWhite;
    delay(50);
  }
  else if (buttonStateBlack != lastButtonStateBlack) {
    backlightOn = !backlightOn;

    if (backlightOn) {
      lcd.backlight();
      lcd.init();
    } else {
      lcd.noBacklight();
      lcd.clear();
    }
    delay(200);
  }
}