#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);


void setup() {
  // put your setup code here, to run once:

  lcd.init();
  lcd.backlight();

  // LED //
Serial.begin(115200);
if(!Serial) Serial.println("serial is not ok");
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:

lcd.setCursor(0, 0);
lcd.print("Harap untuk");
delay(2000);
lcd.clear();
lcd.setCursor(0, 1);
lcd.print("Berhati-hati");
delay(4000);
lcd.clear();

  // LED //
digitalWrite(3, HIGH);
Serial.println("red is on");
delay(5000);

digitalWrite(3, LOW);
Serial.println("red is off");

digitalWrite(4, HIGH);
Serial.println("yellow is on");
delay(1000);

digitalWrite(4, LOW);
Serial.println("yellow is off");

digitalWrite(5, HIGH);
Serial.println("green is on");
delay(4000);

digitalWrite(4, HIGH);
Serial.println("yellow is on");
delay(100);

digitalWrite(5, LOW);
Serial.println("green is off");

digitalWrite(4, LOW);
Serial.println("yellow is off");
}