#include <Servo.h>

Servo myservo;  // create servo object to control a servo

int pos = 0;    // variable to store the servo position
int buttonPin = 12; // declare a button pin
int servoPin = 13; // declare the servo pin
int ledPin = 11; // add an LED on pin 11

void setup() {
  myservo.attach(13);  // attaches the servo on pin 13 to the servo object
  pinMode(buttonPin, INPUT_PULLUP); // configure pin with pullup resistor. 
  // Pressed = LOW, normal = HIGH
}

void loop() {
   if (digitalRead(buttonPin) == 0) { // read the button pin to see if it is LOW
   delay(150); // debounce
      for (pos = 0; pos <= 180; pos += 1) { // goes from 0 degrees to 180 degrees
      // in steps of 1 degree
      myservo.write(pos);              // tell servo to go to position in variable 'pos'
      delay(15);                       // waits 15ms for the servo to reach the position
      digitalWrite(ledPin, HIGH); // turn LED ON 
      
      delay(5000); // servo wait for a moment at 180 degrees

      for (pos = 180; pos >= 0; pos -= 1) { // returns from 180 degrees to 0 degrees
      myservo.write(pos);              // tell servo to go to position in variable 'pos'
      delay(15);                       // waits 15ms for the servo to reach the position
      digitalWrite(ledPin, LOW); // turn LED OFF
      }
     }
    }
   }