#include <Servo.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

Servo a;

void setup() {
  lcd.init();
  lcd.backlight();
  lcd.clear();
  a.attach(8); 
  a.write(0);
  lcd.print("Clear");

}

void loop() {
  tone(9, 434, 900);
  delay(1000);
  tone(9, 434, 900);
  lcd.clear();
  lcd.print("Train incoming");
  a.write(90);
  delay(3000);
  tone(9, 434, 900);
  lcd.clear();
  lcd.print("Clear");
  a.write(0);
  delay(3000);
}