#define ledPin 8 
#define tlacitko 12
void setup() {
  pinMode(ledPin, OUTPUT);
  pinMode(tlacitko, INPUT_PULLUP);
  Serial.begin(9600);

}

void loop() {
  digitalWrite(ledPin, HIGH);
  delay(1000);
  digitalWrite(ledPin, LOW);
  delay(1000);
  int asd = digitalRead(tlacitko);
  Serial.println(asd);
}