#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

#define RED_PIN 9
#define GREEN_PIN 10
#define BLUE_PIN 11

#define BUTTON_PIN 2

int buttonState = 0;
int lastButtonState = 0;
int counter = 0;
int colorIndex = 0;

void setup() {
  pinMode(BUTTON_PIN, INPUT);
  pinMode(RED_PIN, OUTPUT);
  pinMode(GREEN_PIN, OUTPUT);
  pinMode(BLUE_PIN, OUTPUT);

  lcd.begin(16, 2);
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Contador: ");
  lcd.setCursor(9, 0);
  lcd.print(counter);

  lcd.setCursor(0, 1);
  lcd.print("Color: nada");
}

void loop() {
  buttonState = digitalRead(BUTTON_PIN);

  if (buttonState == HIGH && lastButtonState == LOW) {
    counter++;
    colorIndex = counter % 3;

    lcd.setCursor(9, 0);
    lcd.print("    ");
    lcd.setCursor(9, 0);
    lcd.print(counter);

    changeLEDColor(colorIndex);
    delay(200);
  }
  lastButtonState = buttonState;
}

void changeLEDColor(int index) {
  lcd.setCursor(7, 1);
  lcd.print("    ");
  lcd.setCursor(7, 1);

  switch (index) {
    case 0;
    analogWrite(RED_PIN, 225);
    analogWrite(GREEN_PIN, 0);
    analogWrite(BLUE_PIN, 0);
    lcd.print("Rojo");
    break;
  case 1:
    analogWrite(RED_PIN, 0);
    analogWrite(GREEN_PIN, 225);
    analogWrite(BLUE_PIN, 0);
    lcd.print("Verde");
    break;
  case 2:
    analogWrite(RED_PIN, 0);
    analogWrite(GREEN_PIN, 0);
    analogWrite(BLUE_PIN, 225);
    lcd.print("Azul");
    break;
  }
}