// https://wokwi.com/projects/371826133999362049
// https://forum.arduino.cc/t/odd-code-behaviour-just-fya/1153935

# define anLED  7

void setup() {
  Serial.begin(115200);
  Serial.println(" close to minimum \n");

  pinMode(anLED, OUTPUT);
  digitalWrite(anLED, LOW);

  bool flag;

  int xx = analogRead(A0);

  Serial.print("reading "); Serial.println(xx);
  Serial.print("flag before          "); Serial.println(flag);

  if (xx > 100) {
    Serial.println("       WTF");  // Serial.flush(); for (; ;);
    flag = true;
  }

  Serial.print("flag after           "); Serial.println(flag);
}

void loop() {
}