#include <Servo.h> // Include servo library
Servo servo1; // Create new servo 

void setup() {
  servo1.attach(9); // Attach servo to pin 9
}

void loop() {
  servo1.write(180); // Put servo to max position
  delay(1000); // Wait 1s.
  servo1.write(0); // Put servo to minimun position
  delay(1000); // Wait 1s.
}