#define led 12

void setup() {
  // put your setup code here, to run once:
  pinMode(led, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(led, HIGH); 
  Serial.println("LED ON for 3 sec");
  delay(3000);
  digitalWrite(led, LOW);
  Serial.println("LED OFF for 2 sec"); 
  delay(2000);
}