const int ledPin = 10;

void setup() 
 {
  // Set the LED pin as an output
  pinMode(ledPin, OUTPUT);
}

void loop()
 {
  // Turn the LED on
  digitalWrite(ledPin, HIGH);
  
  // Wait for 5 seconds
  delay(5000);
  
  // Turn the LED off
  digitalWrite(ledPin, LOW);
  
  // Stop the loop (or you can add a delay if you want it to blink again)
  while (true);
}