#include <Servo.h>
Servo servo;

const uint8_t ledPin = LED_BUILTIN;
const uint8_t servoPin = 9;

void setup()
{
  Serial.begin( 115200 );
  pinMode( ledPin, OUTPUT );
  servo.attach( servoPin );
}

void loop()
{
  const uint32_t now = millis();
  static uint32_t past = now;
  static uint16_t interval = 15;

  if ( now - past >= interval )
  {
    past = now;

    static bool wait = false;

    if ( wait == false )
    {
      static uint8_t pos = 0;
      static bool invert = false;

      if ( ( invert == false && ++pos == 180 )
        || ( invert == true  && --pos == 0   ) )
      {
        invert = !invert;
        wait = true;
        interval = 2000;
        Serial.print( "LED " );
        Serial.println( invert ? "ON" : "OFF" );
        digitalWrite( ledPin, invert ? HIGH : LOW );
      }
      
      servo.write( pos );
    }
    else
    {
      wait = false;
      interval = 15;
    }
  }
}