#include <LiquidCrystal_I2C.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

int led1 =2;
int led2 =3;
int led3 =4;
int button1 = 7;
int button2 = 8;
int button3 = 9;

int lastState = HIGH;
int display1 = true;
int display2 = false;


LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

void setup() {
  // Init
  lcd.init();
  lcd.backlight();
  
  pinMode(button1, INPUT_PULLUP);
  pinMode(button2, INPUT_PULLUP);
  pinMode(button3, INPUT_PULLUP);


  pinMode(led1,OUTPUT);
  pinMode(led2,OUTPUT);
  pinMode(led3,OUTPUT);

  lcd.setCursor(3, 0);
  lcd.print("Hello, world!");
  delay(1000);
  

}


void loop() {

  int button_state1 = digitalRead(button1);
  int button_state2 = digitalRead(button2);
  int button_state3 = digitalRead(button3);


  if (HIGH == button_state1) {
      digitalWrite(led1,HIGH);
      digitalWrite(led2,LOW);
    }
  else {
    digitalWrite(led1,LOW);
    digitalWrite(led2,HIGH);
    }
  delay(100);
  while led1_state
  
}
/* lcd.setCursor(3, 0);
  lcd.print("Hello, world!");
  lcd.setCursor(2, 1);
  lcd.print("Wokwi Online IoT");
  lcd.setCursor(5, 2);
  lcd.print("Simulator");
  lcd.setCursor(7, 3);
  lcd.print("Enjoy!");
  */