int led = 12; // the pin the LED is connected to

void setup() {
  // put your setup code here, to run once:
  pinMode(led, OUTPUT); // Declare the LED as an output

}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(led, HIGH); // Turn the LED on
  delay(1000);
  digitalWrite(led, LOW);
  delay(1000);
}