int myPin=13;

void setup() {
Serial.begin(115200);
pinMode(myPin, OUTPUT);
Serial.println("System ready....");
}

void loop() {
Serial.println("Loop running...");
digitalWrite(myPin, HIGH);
Serial.println("System high");
delay(1000);
digitalWrite(myPin, LOW);
Serial.println("System low");
delay(2000);
Serial.println("-----------------End loop-----\n");
}