void setup() {
  // put your setup code here, to run once:
  pinMode(7, INPUT);
  pinMode(8, INPUT);
  Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.print("prvni: ");
  Serial.println(digitalRead(7));
  Serial.print("druhe: ");
  Serial.println(digitalRead(8));
  Serial.println();
  delay(500);
}