#include <Servo.h>
int buttonPin=12;
int ledPin=13;
int buttonState=0;
Servo myservo;

void setup() {
  // put your setup code here, to run once:
  pinMode(buttonPin,INPUT);
  pinMode(ledPin,OUTPUT);
  myservo.attach(9);

}

void loop() {
  // put your main code here, to run repeatedly:
  buttonState=digitalRead(buttonPin);
  if(buttonState==HIGH)
  {
    digitalWrite(ledPin, HIGH);
    for(int pos=0;pos<=180;pos+=10)
    {
    myservo.write(pos);
    delay(50);
    }
    for(int pos=180;pos>=0;pos-=10)
    {
      myservo.write(pos);
      delay(50);
    }
      digitalWrite(ledPin, LOW);
  }
  else
  {
    digitalWrite(ledPin,LOW);
    myservo.write(0);
  }


}