int ledPin = 12;

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

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(ledPin, HIGH);
  Serial.print("the pin ");
  Serial.print(ledPin);
  Serial.println(" is on");
  delay(250);
  digitalWrite(ledPin, LOW);
  Serial.print("the pin ");
  Serial.print(ledPin);
  Serial.println(" is off");
  delay(1000);

}