int LED1=26;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(LED1,OUTPUT);
 
}

void loop() {
 
    digitalWrite(LED1,HIGH);
    Serial.println("ON");
    delay(100);

    digitalWrite(LED1,LOW);
    Serial.println("OFF");
    delay(100);
   
}