#include <avr/wdt.h>

int start = 0;
int end = 3000;


void setup() {
  Serial.begin(115200);
  wdt_enable(WDTO_2S);
  bitSet(WDTCSR, WDIE);
  

}

void loop() {
  int x = rand() % (end - start + 1) + start;
  delay(x);
  Serial.println(x);
  Serial.println("____________");
  wdt_reset();
}


ISR(WDT_vect){
  Serial.println("x > 2s");
}