#include <LiquidCrystal_I2C.h>

#define I2C_ADDR 0x27
#define LCD_COLUMNS 20
#define LCD_ROWS 4
int motion = 8;

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_ROWS);

void setup() {
  // put your setup code here, to run once:

 lcd.begin(20, 4);
 Serial.begin(9600);
 
}

void loop() {
  // put your main code here, to run repeatedly:
RandomX();
delay(2000);
}

void RandomX() {
  

  int motionValue = digitalRead(motion);

if(motionValue == 1){

  lcd.clear();
  int pocetX = random(1,40);

  for (int i = 0; i < pocetX; i++) {
    int x = random(20);
    //Serial.println(x);
    int y = random(4);
    //Serial.println(y);
    lcd.setCursor(x, y);
    lcd.print("X");
 }
 Serial.println(pocetX);
}


}