#include <LiquidCrystal_I2C.h>    // Libreria que controla el I2C
#include <Wire.h>                 // La libreria Wire viene incluida en el IDE de arduino
// LCD screen addresses
LiquidCrystal_I2C primaryLcd(0x20, 16, 2);
LiquidCrystal_I2C secondaryLcd1(0x21, 16, 2);
LiquidCrystal_I2C secondaryLcd2(0x22, 16, 2);
LiquidCrystal_I2C secondaryLcd3(0x23, 16, 2);
LiquidCrystal_I2C secondaryLcd4(0x24, 16, 2);

// LED pins
const int ledPins[] = {13, 12, 11, 10, 9, 8, 7, 6, 5, 4};
const int speakerPin = 3;

void setup() {
  configureOutputPins();
  configurePrimaryLcd();
  configureMessage(secondaryLcd1, "Buenos dias", "  Ingeniero :)");
  configureMessage(secondaryLcd2, "Ingenieria", "  Informatica");
  configureMessage(secondaryLcd3, "Quiero un", "    Tamal");
  configureMessage(secondaryLcd4, "Si el Don pudo", "El Arduino tamb");
}

void loop() {
  digitalWrite(speakerPin, LOW);
  turnOnLedsUpToDown();
  digitalWrite(speakerPin, HIGH);
  turnOnLedsDownToUp();
}

void configureOutputPins() {
  for (int i = 0; i < 10; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
  pinMode(speakerPin, OUTPUT);
}

void ledBlinking(int ledPin) {
  digitalWrite(ledPin, HIGH);
  delay(1500);
  digitalWrite(ledPin, LOW);
}

void turnOnLedsUpToDown() {
  for (int i = 0; i < 10; i++) {
    refreshInfoDisplay(i + 1);
    ledBlinking(ledPins[i]);
  }
}

void turnOnLedsDownToUp() {
  for (int i = 9; i >= 0; i--) {
    if (i == 8) {
      primaryLcd.setCursor(7, 1);
      primaryLcd.print("  ");
    }
    refreshInfoDisplay(i + 1);
    ledBlinking(ledPins[i]);
  }
}

void refreshInfoDisplay(int ledNumber) {
  primaryLcd.setCursor(7, 1);
  primaryLcd.print(ledNumber);
}

void configurePrimaryLcd() {
  primaryLcd.init();
  primaryLcd.backlight();
  primaryLcd.setCursor(7, 0);
  primaryLcd.print("PSE");
  primaryLcd.setCursor(3, 1);
  primaryLcd.print("LED:   ON");
}

void configureMessage(LiquidCrystal_I2C lcd, String firstMessage, String secondMessage) {
  lcd.init();
  lcd.backlight();
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print(firstMessage);
  lcd.setCursor(0, 1);
  lcd.print(secondMessage);
}