#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);

long cas;
int s;
int y;

void setup() {
lcd.init();
lcd.backlight();
randomSeed(analogRead(A0));
}

void loop() {
if (millis() >= cas){
s = random(1,16);

lcd.clear();
for (y = 0; y < s; y++){
lcd.print("x");
cas += 300;
}

}


}