#include <LiquidCrystal_I2C.h>

#define I2C_ADDR1    0x27
#define I2C_ADDR2    0x28
#define LCD_COLUMNS 16
#define LCD_LINES   2

LiquidCrystal_I2C lcd1(I2C_ADDR1, LCD_COLUMNS, LCD_LINES);
LiquidCrystal_I2C lcd2(I2C_ADDR2, LCD_COLUMNS, LCD_LINES);
int lcd=0,up=0;
int c=0;

void setup() {
  // Init
  lcd1.init();
  lcd1.backlight();
  // Init
  lcd2.init();
  lcd2.backlight();

}

void loop() {
  if(up==0&&lcd==0){
    lcd1.setCursor(c,0);
    lcd1.print(">");
    delay(50);
    lcd1.setCursor(c,0);
    lcd1.print(" ");

    if(c<=15)
         c++;
    else if (c==16){
         c=0;
         lcd++;  
    }
  }else if (up==0&&lcd==1){
    lcd2.setCursor(c,0);
    lcd2.print(">");
    delay(50);
    lcd2.setCursor(c,0);
    lcd2.print(" ");
    if(c<15)
         c++;
    else if (c==15){
         up++;  
    }
  }else if (up==1&&lcd==1){
     lcd2.setCursor(c,1);
     lcd2.print("<");
     delay(50);
     lcd2.setCursor(c,1);
     lcd2.print(" ");
     if(c>0)
           c--;
     else if(c==0){
           c=15;
           lcd=0;
     }
  }else if(up==1&&lcd==0){
     lcd1.setCursor(c,1);
     lcd1.print("<");
     delay(50);
     lcd1.setCursor(c,1);
     lcd1.print(" ");
     if(c>0)
           c--;
     else if(c==0){
            c=0;
            up=0;
     }
  }
}