// put your setup code here, to run once:
#include <Servo.h>

Servo motor;

void setup() {
  motor.attach(9);
}

void loop() {
  // put your main code here, to run repeatedly:
for(int i = 0; i<=180; i++) {
motor.write(i);
delay(10);
}

for(int q = 180; q>=0; q--) {
  motor.write(q);
  delay(10);
}

}