#include <LiquidCrystal.h>
#include <EEPROM.h>
int score = 0;
int highscore = 0;
long rnum;
long bud = millis() + 1000;
long paus = millis() + 800;
LiquidCrystal lcd(12, 11, 10, 9, 8, 7);
void setup() {
  lcd.begin(16, 2);
  Serial.begin(9600);
  EEPROM.begin();
  highscore = EEPROM.read(100);
    lcd.setCursor(0,1);
    lcd.print(score);
    Serial.println(EEPROM.read(100,highscore));
  pinMode(2, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(2), scored, FALLING);
}

void loop() {
    lcd.setCursor(0,0);

    if(millis() >= bud )
  {
    lcd.print(rnum);
    bud = millis()+250;
    rnum = random(1, 10);
  };

    if(millis() >= paus)
  {
    lcd.setCursor(0,0);
    lcd.print(" ");
    paus = millis() + 150;
  };
}

void scored() {
  if(rnum == 1 || 
     rnum == 5 || 
     rnum == 10 && digitalRead(2) == HIGH)
  {
    score++;
    EEPROM.write(100, score);
    lcd.setCursor(0,1);
    lcd.print(" ");
    lcd.setCursor(0,1);
    lcd.print(score);
  }
  else if(rnum == 0 || 
            rnum == 2 || 
            rnum == 3 || 
            rnum == 4 || 
            rnum == 6 || 
            rnum == 7 || 
            rnum == 8 || 
            rnum == 9 && digitalRead(2) == HIGH)
    {
    score--;
    EEPROM.write(100, score);
    lcd.setCursor(0,1);
    lcd.print(" ");
    lcd.setCursor(0,1);
    lcd.print(score);
   };

  if(score > highscore)
  {
    highscore = score;
    EEPROM.put(100, highscore);
  }

}