int main(){
  sei();   //// Global interrupt enable
  WDT_Init(); // Initialize Watchdog Timer in interrupt mode
  DDRB |= (1 << PORTB0); 
  PORTB &= ~(1 << PORTB0); // Initialize LED to OFF
  while(1){

  }
}

void WDT_Init() {
  WDTCSR = 0x00; //  // Step 1: Disable WDT initially
  WDTCSR |= (1 << WDCE) | (1 << WDE); //  Step 2: Enable WDT configuration mode
  WDTCSR = (1 << WDIE) | (1 << WDE) | (1 << WDP2) | (1 << WDP1) | (1 << WDP0);
  //WDTCSR |= (1 << WDIE); // Enable WDT Interrupt Mode and disable reset
}

 ISR(WDT_vect){
  // Turn on the LED when WDT times out
    PORTB |= (1 << PORTB0); // Set PB0 to HIGH (LED ON)
 }