#include <Servo.h>
Servo myServo;
int servoPin=6;
int pos=0;
void setup() {
  Serial.begin(9600);
  myServo.attach(servoPin);
}

void loop() {;
  for(pos=0;pos<=180;pos=pos+1){
    myServo.write(pos);
    delay(10);
  }
  for(pos=180;pos>=0;pos=pos-1){
    myServo.write(pos);
    delay(10);
  }
}