#include <Servo.h>

Servo servo;

int pot = A3;
int val = 0;

void setup() {
  pinMode(pot, INPUT);
  servo.attach(3);
  Serial.begin(9600);
}

void loop() {
//val = map(analogRead(A3),0,1023,0,180);
servo.write(-90);
delay(1000);
servo.write(90);
delay(1000);
//Serial.println(val);
}