#include <avr\wdt.h>

void setup() {
  Serial.begin(9600);
  // set watchdog to 8s
  wdt_enable(WDTO_8S);
  Serial.println("V setupe");
}

void loop() {
  // watchdog reset
  wdt_reset();
  digitalWrite(13, HIGH);
  Serial.println("ZAP");
  delay(10000);
  digitalWrite(13, LOW);
  Serial.println("VYP");

}