void setup() 
{
 // put your setup code here, to run once:
 pinMode(13,OUTPUT); Serial.begin(9600);
}
void loop() {
 // put your main code here, to run repeatedly: 
digitalWrite(13,HIGH); delay(7000);
 Serial.println("LED is ON"); digitalWrite(13,LOW); 
Serial.println("LED is OFF"); delay(2000);
}