#include <Servo.h>

int BUTTON_PIN1 = 13;

Servo myservo;  // create servo object to control a servo
// twelve servo objects can be created on most boards

int pos = 0;    // variable to store the servo position

void setup() {
  myservo.attach(9);  // attaches the servo on pin 9 to the servo object
  pinMode(BUTTON_PIN1, INPUT);
}

void loop() {
  int i=1;
  if (digitalRead(BUTTON_PIN1) == HIGH)
  {
    while (i == 1)
    {
      myservo.write(90);            
      delay(1.5); 
      myservo.write(0);            
      delay(19); 
    }
  }
 
}