// LED Control
#define ledpin 25
void setup() {
  // put your setup code here, to run once:
  pinMode(ledpin,OUTPUT);// Pin , Mode
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(ledpin, HIGH);
Serial.println("LED ON");
delay(2000); // turn on 2 sec
digitalWrite(ledpin, LOW);
Serial.println("LED OFF");
delay(2000); // Turn off 2 Sec
}