int X = 0;
int blokuj = 0;

void setup() 
{
Serial.begin(9600);
pinMode(A0, INPUT_PULLUP);
}

void loop() {
  if (digitalRead(A0) == LOW && blokuj == 0)
{
  blokuj = 1;
 X ++;
 Serial.println(X);
}
 if (digitalRead(A0) == HIGH && blokuj == 1)
 {
blokuj = 0;
 }
}