// Pin assignments
const int redLED = 12;     // Pin connected to red LED
const int yellowLED = 11;  // Pin connected to yellow LED
const int greenLED = 10;   // Pin connected to green LED

void setup() {
  // Set pins as OUTPUT
  pinMode(redLED, OUTPUT);
  pinMode(yellowLED, OUTPUT);
  pinMode(greenLED, OUTPUT);
}

void loop() {
  // Red LED (rapid blinking beacon light)
  digitalWrite(redLED, HIGH);
  delay(100); // 100ms on
  digitalWrite(redLED, LOW);
  delay(100); // 100ms off

  // Yellow LED (medium blinking light)
  digitalWrite(yellowLED, HIGH);
  delay(500); // 500ms on
  digitalWrite(yellowLED, LOW);
  delay(500); // 500ms off

  // Green LED (slow blinking light)
  digitalWrite(greenLED, HIGH);
  delay(1000); // 1 second on
  digitalWrite(greenLED, LOW);
  delay(1000); // 1 second off
}