Basics covered, can do anything now right?

[Joseph]

const long PIN = 52;

void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(PIN, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(PIN, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(5000);                      // wait for a second
  digitalWrite(PIN, LOW);   // turn the LED off by making the voltage LOW
  delay(1000);                      // wait for a second
}