void setup() {
  // below used to set the mode of the pin(12) as input or output.
  pinMode(12, OUTPUT); 

}

void loop() {
  // use declared pins here:
  // digitalWrite() function for making the red LED glow
  digitalWrite(12, HIGH);
  delay(1000); // Wait for 1000 millisecond(s)
  digitalWrite(12, LOW);
  delay(1000); // Wait for 1000 millisecond(s)
}