#include <LiquidCrystal_I2C.h>
#define I2C_ADDR 0x27
#define LCD_COLUMNS 20
#define LCD_ROWS 4

int pot = A0;

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_ROWS);


void setup() {
  // put your setup code here, to run once:
pinMode(pot, INPUT);


lcd.init();

lcd.backlight();


lcd.print("ahoj");

lcd.setCursor(10,1);
lcd.print("10 1");

lcd.blink();


}

void loop() {
  // put your main code here, to run repeatedly:
int potValue = analogRead(pot);
int mPotValue = map(potValue, 0, 1023, 0, 20,);

lcd.setCursor(mPotValue, 0);
led.cursor();
}