#include <LiquidCrystal.h>
 
LiquidCrystal lcd(12, 11, 10, 9, 8, 7);

void setup() {
  Serial.begin(115200);

  pinMode(0, OUTPUT);
  pinMode(1, OUTPUT);
  pinMode(2, OUTPUT);

  lcd.begin(16, 2);
}

void loop() {
  while (true) {
    // LED - RED
    lcd.setCursor(0, 0);
    lcd.print("Red       ");
    digitalWrite(0, HIGH);
    delay(2000);
    digitalWrite(0, LOW);

    // LED - YELLOW
    lcd.setCursor(0, 0);
    lcd.print("Yellow       ");
    digitalWrite(1, HIGH);
    delay(2000);
    digitalWrite(1, LOW);

    // LED - GREEN
    lcd.setCursor(0, 0);
    lcd.print("Green       ");
    digitalWrite(2, HIGH);
    delay(2000);

    // LED - GREEN flicker
    lcd.setCursor(0, 0);
    lcd.print("Green - fl");
    for (int i = 0; i < 3; i++) {
      digitalWrite(2, LOW);
      delay(1000);
      digitalWrite(2, HIGH);
      delay(1000);
    }
    digitalWrite(2, LOW);
    delay(1000);
  }
}