#include <Servo.h>

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(PA10);  // attaches the servo on pin 9 to the Servo object
}

void loop() {
   // goes from 0 degrees to 180 degrees
    // in steps of 1 degree
    myservo.write(0);              // tell servo to go to position in variable 'pos'
    delay(15);                       // waits 15 ms for the servo to reach the position
   // goes from 180 degrees to 0 degrees
    myservo.write(90);              // tell servo to go to position in variable 'pos'
    delay(15);  
    myservo.write(180);              // tell servo to go to position in variable 'pos'
    delay(15);                      // waits 15 ms for the servo to reach the position
  }