#include   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() {   digitalWrite(10,HIGH   );   myservo.attach(9);  // attaches the servo on pin 9 to the servo object }   void loop() {   for (pos = 0; pos <= 180; pos += 3) { // 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(5); // waits 15ms for the servo to reach the position } for (pos = 180; pos >= 0; pos -= 3) { // goes from 180 degrees to 0 degrees     myservo.write(pos);              // tell servo to go to position in variable 'pos'     delay(5);                       // waits 15ms for the servo to reach the position   } }