#include <Servo.h>

Servo myservo;  // create servo object to control a servo
#define servoPin 3 // ~
#define pushButtonPin 2

int angle = 0;    // initial angle for servo (between 0 and 180)
int angleStep = 10;
const int minAngle = 0;
const int maxAngle = 190;

const int type = 2; // watch video for details. Link is at the top of this code (robojax)
int buttonPushed = 0;

void setup() {
  Serial.begin(9600);          // setup serial
  myservo.attach(servoPin);    // attaches the servo on pin 3 to the servo object
  pinMode(pushButtonPin, INPUT_PULLUP);
  Serial.println("Rotation Starting");
  myservo.write(angle); // initial position
}

void loop() {
  if (digitalRead(pushButtonPin) == LOW) {
    buttonPushed = 1;
  }

  if (buttonPushed) {
    // change the angle for next time through the loop:
    angle = angle + angleStep;

    // reverse the direction of the movement at the ends of the angle:
    if (angle >= maxAngle) {
      delay(1500);
      angleStep = -angleStep;
      if (type == 1) {
        buttonPushed = 0;
      }
    }

    if (angle <= minAngle) {
      angleStep = -angleStep;
      if (type == 2) {
        buttonPushed = 0;
      }
    }

    myservo.write(angle); // move the servo to the desired angle
    Serial.print("Moved to: ");
    Serial.print(angle);   // print the angle
    Serial.println(" degree");
    delay(30); // waits for the servo to get there
  }
}