#include <Servo.h>
Servo myServo;
void setup() {
  // put your setup code here, to run once:
  myServo.attach(6);
}

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