int buttonPin=6;
int buttonPin2=5;
int LedPin=11;

bool idk=0;
bool buttonState=0;
bool lastButtonState=0;
bool buttonState2=0;
bool lastButtonState2=0;
bool LedState=0;

unsigned long lastDebounceTime=0;
unsigned long BeforeTime=0;
unsigned long lastDebounceTime2=0;

int debounceDelay=50;
int Interval = 1000;
String PomocnaHodnota;
int PomocnaHodnota2=0;
int PomocnaHodnota3=0;

void setup() {
pinMode(LedPin, OUTPUT);
pinMode(buttonPin, INPUT);
pinMode(buttonPin2, INPUT);
Serial.begin(9600);
}

void loop() {
bool reading = digitalRead(buttonPin);
if (reading != lastButtonState) 
{
lastDebounceTime = millis();
}
if ((millis() - lastDebounceTime) > debounceDelay) 
{
if (reading != buttonState) 
{
buttonState = reading;
if (buttonState == HIGH) 
{
  PomocnaHodnota3=PomocnaHodnota3+1;
  Serial.println("tlacidlo bolo stlacene "+String(PomocnaHodnota3)+"-krát");
idk=!idk;
}
}
}
if(idk==1)
{
if(millis()-BeforeTime>=Interval)
{
BeforeTime =millis();
LedState=!LedState;
digitalWrite(LedPin,LedState);
}
}
else

digitalWrite(LedPin,0);
lastButtonState = reading;

if (Serial.available()>0) {
    PomocnaHodnota=Serial.readString();
    PomocnaHodnota.trim();
    int Time = PomocnaHodnota.toInt();
        if (Time>0 && Time<=10) {
          Time= Time*1000;
          Interval=Time;
          Serial.println("nový interval je "+String(Interval));
          }
        else {
        Serial.println("Zadal si nespravnu hodnotu, skus to znova");
        Interval=0;
        digitalWrite(LedPin, LOW);
        }
  }
  bool reading2 = digitalRead(buttonPin2);
  if (reading2 != lastButtonState2) {
        lastDebounceTime2 = millis();
    }
    if ((millis() - lastDebounceTime2) > debounceDelay) {
        if (reading2 != buttonState2) {
            buttonState2 = reading2;
           if (buttonState2 == HIGH) 
           {
           PomocnaHodnota2=!PomocnaHodnota2; 
           }
           }
    }
    if (PomocnaHodnota2==1){
      Interval=Interval-100;
      PomocnaHodnota2=0;
       Serial.println("nový interval je "+String(Interval));
    }
    lastButtonState2 = reading2;
/*Serial.println(Interval);*/
}