void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, STM32!");
  pinMode(D14, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(D14, HIGH);
  delay(1000); // this speeds up the simulation
  digitalWrite(D14, LOW);
  delay(1000);
}