#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0X27,16,2);
#define led 13
#define tombol1 12 
#define tombol2 14
#define tombol3 27
int i,menu,jam,menit;
void setup() {
  lcd.backlight(); lcd.init();
  lcd.setCursor(0,0); lcd.print("MAU TULISAN APA");
 
pinMode (led,OUTPUT);
pinMode (tombol1,INPUT_PULLUP);
pinMode (tombol2,INPUT_PULLUP);
pinMode (tombol3,INPUT_PULLUP);
}

void loop() {
  lcd.setCursor(8,1); lcd.print("MENU=");
  lcd.print(menu); lcd.print(" ");
  if (digitalRead(tombol2)==LOW){
    menu=menu+1;
    if(menu>2) menu=0;
    delay(300);
 }
  if (menu==0){
    lcd.setCursor(0,0); lcd.print(" JAM DIGITAL ");
  }
  else if (menu==1){
    lcd.setCursor(0,0);lcd.print(" SETTING JAM ");
    lcd.setCursor(0,1); lcd.print("JAM="); lcd.print(jam); lcd.print(menit);
    if(digitalRead(tombol3)==0) {
      jam++; if(jam>23) jam=0;
    }
    else if(digitalRead(tombol1)==0){
      jam--; if(jam<0) jam=23;
    }
  }
  else if(menu==2){
    lcd.setCursor(0,0); lcd.print(" SETTING MENIT ");
    lcd.setCursor(0,1); lcd.print("MENIT="); lcd.print(menit);
  }
}