/*
 * This Arduino sketch controls a traffic light system using a joystick module.
 * When the joystick is moved up, the red LED turns on.
 * When the joystick is moved left, the yellow LED turns on.
 * When the joystick is moved right, the green LED turns on.
 * When the joystick is moved down, all LEDs turn on.
 */

// Pin definitions
const int VRX_PIN = A0; // Joystick X-axis
const int VRY_PIN = A1; // Joystick Y-axis
const int SW_PIN = 7;   // Joystick button (not used)
const int RED_LED_PIN = 2;   // Red LED
const int YELLOW_LED_PIN = 3; // Yellow LED
const int GREEN_LED_PIN = 4;  // Green LED

void setup() {
  // Initialize serial communication
  Serial.begin(115200);

  // Set LED pins as outputs
  pinMode(RED_LED_PIN, OUTPUT);
  pinMode(YELLOW_LED_PIN, OUTPUT);
  pinMode(GREEN_LED_PIN, OUTPUT);

  // Set joystick button pin as input
  pinMode(SW_PIN, INPUT);
}

void loop() {
  // Read joystick values
  int xValue = analogRead(VRX_PIN);
  int yValue = analogRead(VRY_PIN);

  // Determine joystick direction
  if (yValue < 300) { // Joystick moved up
    digitalWrite(RED_LED_PIN, HIGH);
    digitalWrite(YELLOW_LED_PIN, LOW);
    digitalWrite(GREEN_LED_PIN, LOW);
  } else if (xValue < 300) { // Joystick moved left
    digitalWrite(RED_LED_PIN, LOW);
    digitalWrite(YELLOW_LED_PIN, HIGH);
    digitalWrite(GREEN_LED_PIN, LOW);
  } else if (xValue > 700) { // Joystick moved right
    digitalWrite(RED_LED_PIN, LOW);
    digitalWrite(YELLOW_LED_PIN, LOW);
    digitalWrite(GREEN_LED_PIN, HIGH);
  } else if (yValue > 700) { // Joystick moved down
    digitalWrite(RED_LED_PIN, HIGH);
    digitalWrite(YELLOW_LED_PIN, HIGH);
    digitalWrite(GREEN_LED_PIN, HIGH);
  } else { // Joystick in neutral position
    digitalWrite(RED_LED_PIN, LOW);
    digitalWrite(YELLOW_LED_PIN, LOW);
    digitalWrite(GREEN_LED_PIN, LOW);
  }

  // Small delay to stabilize readings
  delay(100);
}