void setup() { // the setup function runs once when you press reset or power the board
pinMode(12, OUTPUT); // initialize digital pin 12 as an output.
}
void loop() { // the loop function runs over and over again forever
digitalWrite(12, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(12, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}