#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

unsigned long cur = 0;
unsigned long pretime = 0;
int time = 150;
int state = LOW;
int x = 0;

void setup() {
  Serial.begin(115200);
  lcd.init();
  lcd.backlight();

}

void loop() {

showlcd();
  


  /* for(int col = 15; col >= 0; col--){
    lcd.setCursor(col, 0);
    lcd.print("Hello");
    delay(200);
    lcd.clear();

    }*/
}///end loop

void showlcd(){
cur = millis();
  if (cur - pretime >= time) {
    pretime = cur;
    if (state == LOW) {
      lcd.setCursor(x, 0);
      lcd.print("Hello");
      state = HIGH;
    } else {
      state = LOW;
      lcd.clear();
      x++;
    }
    if (x >= 16) {
      x = 0;
    }

  }

}