#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,  16, 2); 
void setup(){
  lcd.init();
  lcd.backlight();
  pinMode(4, OUTPUT); // red
  pinMode(3, OUTPUT); // green
  pinMode(2, OUTPUT); // blue
}

void loop(){
  for(int led = 4; led >= 2; led--){
    lcd.clear();
    digitalWrite(led, HIGH);
    if(led == 4) {
      lcd.setCursor(0, 0);
      lcd.print("red");}
    if(led == 3) {
      lcd.setCursor(5, 0);
      lcd.print("green");}
    if(led == 2) {
      lcd.setCursor(5, 1);
      lcd.print("blue");}
    delay(1000);
    digitalWrite(led, LOW);
  }
}