#include <ESP32Servo.h>

Servo barrier; // Servo for the barrier
int redLight = 13; // GPIO pin for Red light
int yellowLight = 12; // GPIO pin for Yellow light
int greenLight = 14; // GPIO pin for Green light
int delayTime = 3000; // Delay for light transitions

void setup() {
  pinMode(redLight, OUTPUT);
  pinMode(yellowLight, OUTPUT);
  pinMode(greenLight, OUTPUT);

  barrier.attach(25); // Attach servo to GPIO25
  barrier.write(90);  // Barrier starts closed (90 degrees)
}

void loop() {
  // Red Light Phase
  digitalWrite(redLight, HIGH);
  digitalWrite(yellowLight, LOW);
  digitalWrite(greenLight, LOW);
  barrier.write(90); // Barrier remains closed
  delay(delayTime);

  // Yellow Light Phase
  digitalWrite(redLight, LOW);
  digitalWrite(yellowLight, HIGH);
  digitalWrite(greenLight, LOW);
  delay(delayTime);

  // Green Light Phase
  digitalWrite(redLight, LOW);
  digitalWrite(yellowLight, LOW);
  digitalWrite(greenLight, HIGH);
  barrier.write(0); // Barrier opens (0 degrees)
  delay(delayTime);
}