int cislo;

int test = 0;

void setup() 
{
  pinMode(A5, INPUT_PULLUP);
  Serial.begin(9600);

}

void loop() 
{


  if(digitalRead(A5) == LOW && test == 0)
  {

    test = 1;
    cislo++;
    Serial.println(cislo);


  }

  else if(digitalRead(A5) == HIGH && test == 1)
  {

    test = 0;
  }
}