// Find the bug: This creates an infinite loop!
void setup() {
  pinMode(0, OUTPUT);
}

void loop() {
  int count = 0; // int is 16bit value after max it starts from beginnig
  
  while (count < 5) {        // Should blink 5 times
    digitalWrite(0, HIGH);
    delay(200);
    digitalWrite(0, LOW);
    delay(200);
    
  }
  count = count + 1; // this also error because count can run over 
  delay(1000);
}