// Define the LED pins for NodeMCU
const int redPin = 25;    // Red LED connected to D1
const int yellowPin = 26; // Yellow LED connected to D2
const int greenPin = 33;  // Green LED connected to D3

void setup() {
  // Initialize the LED pins as outputs
  pinMode(redPin, OUTPUT);
  pinMode(yellowPin, OUTPUT);
  pinMode(greenPin, OUTPUT);

  // Start Serial communication
  Serial.begin(115200);
}

void loop() {
  // Red LED blinks for 5 seconds
  digitalWrite(redPin, HIGH);   // Turn on red LED
  digitalWrite(yellowPin, LOW); // Turn off yellow LED
  digitalWrite(greenPin, LOW);  // Turn off green LED
  Serial.println("STOP");
  delay(5000); // Red LED on for 5 seconds

  // Yellow LED blinks for 3 seconds
  digitalWrite(redPin, LOW);    // Turn off red LED
  digitalWrite(yellowPin, HIGH); // Turn on yellow LED
  digitalWrite(greenPin, LOW);  // Turn off green LED
  Serial.println("WAIT");
  delay(3000); // Yellow LED on for 3 seconds

  // Green LED blinks for 8 seconds
  digitalWrite(redPin, LOW);    // Turn off red LED
  digitalWrite(yellowPin, LOW); // Turn off yellow LED
  digitalWrite(greenPin, HIGH); // Turn on green LED
  Serial.println("GO");
  delay(8000); // Green LED on for 8 seconds
}