int LED0 = 4;


void setup() {
  Serial1.begin(115200);
  Serial1.println("Hello, Cute Student");

  //set GPIO here
  pinMode(LED0, OUTPUT);
  //pinMode(SW0, INPUT_PULLUP);
}

void loop() {
digitalWrite(LED0,HIGH);
delay(1000);
digitalWrite(LED0,LOW);
delay(1000);
 
} //End Program here ////////////////////////////////////