#include <Servo.h>

const int ledPin = 13;
const int buttonPin = 12;
const int servoPin = 11;

// Button vars
int buttonState = 0;
int toggle = 0;

// Servo vars
Servo myservo;
int servoVal = 0;
int direction = 0;

// Potentiometer vars
int potentVal = 0;

void setup() {
  // put your setup code here, to run once:
  pinMode(ledPin, OUTPUT);
  pinMode(buttonPin, INPUT);
  myservo.attach(servoPin);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  buttonState = digitalRead(buttonPin);

  if (buttonState == HIGH && toggle == 0) {
    toggle = 1;
    digitalWrite(ledPin, HIGH);
    delay(200);
  } else if (buttonState == HIGH && toggle == 1) {
    toggle = 0;
    digitalWrite(ledPin, LOW);
    delay(200);
  }

  if (toggle >= 1) {
    potentVal = analogRead(A0);
    potentVal = map(potentVal, 5, 777, 0, 180);
    servoVal = potentVal;
    myservo.write(servoVal);
    delay(1);
  } else if (toggle <= 0) {
    if (direction == 0) {
      servoVal += 2;
      delay(15);
    } else {
      servoVal -= 2;
      delay(15);
    }

    if (servoVal >= 180) {
      direction = 1;
    } else if (servoVal <= 0) {
      direction = 0;
    }

    myservo.write(servoVal);
    delay(15);
  }
}