// Source: chapter_02.SpaceshipInterface.ino
// Description: This program controls a series of LEDs using one switch
// Programmed by: Douglas Ferreira / January 28, 2024

int switchState = 0;

void setup() {
  // Initialize all the LED pins as outputs and the switch pin as an input
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(2, INPUT);

  digitalWrite(3, LOW); // Ensure green LED is off
  digitalWrite(4, LOW); // Ensure red LED is off
  digitalWrite(5, LOW); // Ensure other red LED is off
}

void loop() {
  // Read the state of the switch
  switchState = digitalRead(2);

  if (switchState == LOW) {
    // The button is not pressed
    digitalWrite(3, HIGH); // Turn on green LED
    digitalWrite(4, LOW);  // Turn off red LED
    digitalWrite(5, LOW);  // Turn off other red LED
  } else {
    // The button is pressed
    digitalWrite(3, LOW);  // Turn off green LED
    digitalWrite(4, LOW);  // Ensure this red LED is off before toggling
    digitalWrite(5, HIGH); // Turn on other red LED
    delay(250); // Wait for a quarter second

    // Toggle the LEDs
    digitalWrite(4, HIGH); // Turn on red LED
    digitalWrite(5, LOW);  // Turn off other red LED
    delay(250); // Wait for a quarter second
  }
}