#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 20, 4); 

#define LED_MERAH 2
#define LED_BIRU 4

void setup() {
  Serial.begin(115200);
  lcd.init();
  lcd.backlight();
  pinMode(LED_MERAH, OUTPUT);
  pinMode(LED_BIRU, OUTPUT);

  tampilan();
}

void tampilan() {
  lcd.setCursor(3, 0);
  lcd.print("PRAKTEK ESP23");
  lcd.setCursor(5, 1);
  lcd.print("LCD - LED");
}

void led() {
  // Nyalakan LED merah dan matikan LED biru
  digitalWrite(LED_MERAH, HIGH);
  digitalWrite(LED_BIRU, LOW);

  lcd.setCursor(4, 2);
  lcd.print("Merah NYALA  "); 
  lcd.setCursor(4, 3);
  lcd.print("Biru PADAM   "); 

  delay(1000); 

  // Matikan LED merah dan nyalakan LED biru
  digitalWrite(LED_MERAH, LOW);
  digitalWrite(LED_BIRU, HIGH);

  lcd.setCursor(4, 2);
  lcd.print("Biru NYALA   "); 
  lcd.setCursor(4, 3);
  lcd.print("Merah PADAM   "); 

  delay(1000); 
}

void loop() {
  led();
}