#include <Servo.h>


Servo myservo;

int potpin = 0;
int val;

void setup() {
  pinMode(3, OUTPUT);
  // put your setup code here, to run once:
    myservo.attach(9);
    }

    void loop() {
      // put your main code here, to run repeatedly:
        digitalWrite(3, LOW);
        delay(5000);
        val = analogRead(potpin);
          val = map(0, 1023, 0, 0, 90);
            myservo.write(val);
              delay(5000);
        digitalWrite(3, HIGH);
        delay(5000);
          val = map(0, 1023, 0, 180, 0);
            myservo.write(val);
            delay(5000);
     }