#define LED_BUT_PIN 21   // Define input 1 as LED button pin
#define SERVO_BUT_PIN 33 // Define input 2 as servo button pin
#define SERVO_PIN 13     // Define servo pin as D13

int ledState = 0;        // Define the initial state of the LED button
int ledBrightness = 0;   // Define the initial brightness of the LED (0-255)

#include <Servo.h>       // Include the Servo library

Servo myServo;           // Create a Servo object to control the servo

void setup() {
  pinMode(LED_BUT_PIN, INPUT);    // Set LED button pin as input
  pinMode(SERVO_BUT_PIN, INPUT);  // Set servo button pin as input
  pinMode(22, OUTPUT);           // Set D22 as output for LED
  myServo.attach(SERVO_PIN);      // Attach the servo to the pin
}

void loop() {
  int ledButState = digitalRead(LED_BUT_PIN);       // Read LED button state
  int servoButState = digitalRead(SERVO_BUT_PIN);   // Read servo button state

  if (ledButState == HIGH) {
    ledState++;
    if (ledState == 1) {
      ledBrightness = 0;           // Turn off the LED
      analogWrite(22, ledBrightness);
    } else if (ledState == 2) {
      ledBrightness = 64;          // Set low brightness
      analogWrite(22, ledBrightness);
    } else if (ledState == 3) {
      ledBrightness = 128;         // Set medium brightness
      analogWrite(22, ledBrightness);
    } else {
      ledBrightness = 255;         // Set maximum brightness
      analogWrite(22, ledBrightness);
      ledState = 0;
    }
    delay(200);                    // Wait for button debouncing
  }

  if (servoButState == HIGH) {
    for (int pos = 0; pos <= 180; pos += 1) {  // Sweep the servo from 0 to 180 degrees
      myServo.write(pos);                      // Set the servo position
      delay(15);                               // Wait for the servo to move
    }
  
    for (int pos = 180; pos >= 0; pos -= 1) {  // Sweep the servo from 180 to 0 degrees
      myServo.write(pos);                      // Set the servo position
      delay(15);                               // Wait for the servo to move
    }
  } else {
    myServo.write(90);   // Set the servo to 90 degrees
  }
}