void setup() {
Serial.begin(115200);
pinMode(13, OUTPUT);
pinMode(2, OUTPUT);
digitalWrite(2, LOW);
digitalWrite(13, HIGH);
Serial.println("light off");
delay(1000);
digitalWrite(2, HIGH);
digitalWrite(13, LOW);
Serial.println("light on");
delay(1000);
}
void loop() {
digitalWrite(2, HIGH);
digitalWrite(13, LOW);
Serial.println("light on");
delay(1000);
digitalWrite(2, LOW);
digitalWrite(13, HIGH);
Serial.println("light off");
delay(1000);
}