#include <Servo.h>
Servo myServo ; // crear un objeto de servo
int servoPos;

void setup() {
  // put your setup code here, to run once:
myServo.attach(9); // para que trabaje con la salida del pin 9

}

void loop() {
  // put your main code here, to run repeatedly:
for(servoPos = 0 ; servoPos <= 180; servoPos = servoPos + 1) {
  myServo.write(servoPos);
  delay(50);
}
for(servoPos = 180 ; servoPos >= 0; servoPos = servoPos - 1) {
  myServo.write(servoPos);
  delay(50);
}


}