#define R 13
#define G 12
#define B 11
#include <LiquidCrystal_I2C.h>
#include <Wire.h>
int interval = 750;
LiquidCrystal_I2C lcd(0x27, 16, 2);
void setup() {
pinMode(R, OUTPUT);
pinMode(B, OUTPUT);
pinMode(G, OUTPUT);
lcd.init();
lcd.backlight();
}
void loop() {
digitalWrite(R, HIGH);
lcd.clear();
lcd.print("Red");
delay(interval);
digitalWrite(R, LOW);
digitalWrite(G, HIGH);
lcd.clear();
lcd.print("Green");
delay(interval);
digitalWrite(G, LOW);
digitalWrite(B, HIGH);
lcd.clear();
lcd.print("Blue");
delay(interval);
digitalWrite(B, LOW);
}