#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  // put your setup code here, to run once:
  for (int i = 5; i <= 7; i++){
    pinMode(i, OUTPUT);
  }
  lcd.init();
}

void loop() {
  // put your main code here, to run repeatedly:
  lcd.setCursor(0, 0); // column, then row
  lcd.print("Hello!");
  lcd.setCursor(0, 1);
  int reading = analogRead(A0);
  lcd.print(reading);
  if (reading > 500){
    for(int i = 5; i <= 7; i++){
      digitalWrite(i, HIGH);
    }
  } else {
    for(int i = 5; i <= 7; i++){
      digitalWrite(i, LOW);
    }
  }
  delay(1000);
  lcd.clear();
}