#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 20, 4);

const int red = 3;
const int yellow = 4;
const int green = 2;

#define ldr 5

void setup() {
  // put your setup code here, to run once:
  lcd.init();
  lcd.backlight();
  pinMode(red, OUTPUT);
  pinMode(yellow, OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(ldr, INPUT);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  lcd.setCursor(2, 0);
  lcd.print("okokokokok");
  digitalWrite(red, HIGH);
  delay(2000);
  digitalWrite(red, LOW);
  digitalWrite(green, HIGH);
  delay(2000);
  digitalWrite(green, LOW);
  digitalWrite(yellow, HIGH);
  delay(1000);
  digitalWrite(yellow, LOW);
}