#include <Servo.h>
Servo myservo;
int pot = A5;
int potval = 0;
int servo = 3;
int servo_pose = 0;

void setup() {
  // put your setup code here, to run once:
  pinMode(pot, INPUT);
  pinMode(servo, OUTPUT);
  myservo.attach(9);
}

void loop() {
  // put your main code here, to run repeatedly:
  potval = analogRead(potval);
  for (servo_pose = 0; servo_pose <= 180; servo_pose +=1) {
    myservo.write(servo_pose);
    delay(500);
  }
  for (servo_pose = 180; servo_pose <= 180; servo_pose -=1) {
    myservo.write(servo_pose);
    delay(500);
}
}