#include <LiquidCrystal.h>
#include <Bounce2.h>
#define btnRed 7
#define btnGreen 6
#define btnBlu 5
#define interrupt 2
int stevec;
#define ledPin 3
Bounce2::Button tipka1, tipka2, tipka3 = Bounce2::Button();

int lastTime;
int delayTime = 150;

volatile bool state = LOW;
bool prevstate = state;

LiquidCrystal lcd(13,12,11,10,9,8);
int buttonPins[3] = {1,2,3};


void setup(){
  pinMode(btnRed, INPUT_PULLUP);
  pinMode(btnGreen, INPUT_PULLUP);
  pinMode(btnBlu, INPUT_PULLUP);
  
  tipka1.attach(btnRed, INPUT_PULLUP);
  tipka1.interval(10);
  tipka2.attach(btnGreen, INPUT_PULLUP);
  tipka2.interval(10);
  tipka3.attach(btnBlu, INPUT_PULLUP);
  tipka3.interval(10);
  
  Serial.begin(115200);

  pinMode(interrupt, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(interrupt), ISR_button, CHANGE);
}

void loop(){
  if((millis()- lastTime) > delayTime){


    tipka1.update();
    tipka2.update();
    tipka3.update();

    lcd.setCursor(0,0);

    lcd.print(stevec);
    if (tipka1.pressed()){
      stevec++;
      lcd.clear();
      lcd.print(stevec);
      lastTime = millis();
    }
    if (tipka2.pressed()){
      stevec--;
      lcd.clear();
      lcd.print(stevec);
      lastTime = millis();
    }
    if (tipka3.pressed()){
      stevec = 0;
      lcd.clear();
      lcd.print(stevec);
      lastTime = millis();
    }
  

    if (state != prevstate && ((millis()- lastTime) >delayTime)){
      prevstate = state;
      digitalWrite(ledPin, state); 

      lastTime = millis();
    }

  }

}

void ISR_button(){
  state = !state;
  lastTime = millis();
}