// Exercise 1: 
int LedPin = 10; 

void setup() {
  pinMode(LedPin, OUTPUT); 
}

void loop() {
  digitalWrite(LedPin, HIGH); // Turn the LED on (HIGH)
  delay(2000);                // Wait for 2 seconds
  digitalWrite(LedPin, LOW);  // Turn the LED off (LOW)
  delay(1000);                // Wait for 1 second
}