#define ENCODER_CLK 2
#define ENCODER_DT  3
int menu= 1;
int MenuUp=0;
int MenuDown=0;

void setup() {
  lcd.int();
  lcd.backlight();
  Serial.begin(9600);
  pinMode(ENCODER_CLK, INPUT);
  pinMode(ENCODER_DT, INPUT);
  attachInterrupt(digitalPinToInterrupt(ENCODER_CLK), readEncoder, FALLING);
}

void readEncoder() {
  int dtValue = digitalRead(ENCODER_DT);
  if (dtValue == HIGH) {
    Serial.println("Rotated clockwise");
    MenuUp=1;
  }
  if (dtValue == LOW) {
    Serial.println("Rotated counterclockwise");
    MenuDown=1;
  }
}

void loop() { 
  if (MenuDown==1){
MenuDown=0;
menu++;

updateMenu();
delay(100);

}
if (MenuUp==1){
MenuUp=0;
menu--;
updateMenu();
delay(100);

}
  


void updateMenu() {
  switch (menu) {
    case 0:
      menu = 1;
      break;
    case 1:
      lcd.clear();
      lcd.print(">COUNT DOWN");
      lcd.setCursor(0, 1);
      lcd.print(" LED2");
      break;
    case 2:
      lcd.clear();
      lcd.print(" COUNT DOWN");
      lcd.setCursor(0, 1);
      lcd.print(">LED2");
      break;
    case 3:
      lcd.clear();
      lcd.print(">LED3");
      lcd.setCursor(0, 1);
      lcd.print(" LED4");
      break;
    case 4:
      lcd.clear();
      lcd.print(" LED3");
      lcd.setCursor(0, 1);
      lcd.print(">LED4");
      break;
    case 5:
      menu = 4;
      break;
  }
}