#define led_red 15
#define led_yellow 2
#define led_green 4 

// include untuk LCD
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(led_red, OUTPUT);
  pinMode(led_yellow, OUTPUT);
  pinMode(led_green, OUTPUT);
  // set up LCD
  lcd.init();
  lcd.backlight();
}

void loop() {
  // menghidupkan lampu merah
  digitalWrite(led_red, HIGH);
  digitalWrite(led_yellow, LOW);
  digitalWrite(led_green, LOW);
  lcd.setCursor(0, 0);
  lcd.print("Merah: Hidup ");
  delay(1000); // waktu menunggu lampu hidup (mikro second)
  lcd.clear();
  digitalWrite(led_red, LOW);
  digitalWrite(led_yellow, LOW);
  digitalWrite(led_green, LOW);
  delay(1000); // waktu menunggu lampu hidup
  

  // menghidupkan lampu kuning
  digitalWrite(led_yellow, HIGH);
  digitalWrite(led_red, LOW);
  digitalWrite(led_green, LOW);
  lcd.setCursor(0, 0);
  lcd.print("Kuning: Hidup ");
  delay(1500);
  lcd.clear();
  digitalWrite(led_red, LOW);
  digitalWrite(led_yellow, LOW);
  digitalWrite(led_green, LOW);
  delay(1500);

  // menghidupkan lampu hijau
  digitalWrite(led_green, HIGH);
  digitalWrite(led_red, LOW);
  digitalWrite(led_yellow, LOW);
  lcd.setCursor(0, 0);
  lcd.print("Hijau: Hidup ");
  delay(2000);
  lcd.clear();
  digitalWrite(led_red, LOW);
  digitalWrite(led_yellow, LOW);
  digitalWrite(led_green, LOW);
  delay(2000);
}