void setup() {
 Serial.begin(9600);
 pinMode(10, OUTPUT);
}
void loop() {
 digitalWrite(10, HIGH); // turn the LED on (HIGH is the voltage level)
 Serial.println("Blink"); //prints Hello World every time the LED turns on
 delay(1000); // wait for a second
 digitalWrite(10, LOW); // turn the LED off by making the voltage LOW
 delay(1000); // wait for a second
}