#include <Servo.h> //including library
Servo myservo; //naming servo
const int buttonpin = 2;//pin used to connect button and arduino
int buttonState = 0;
int potpin = 0; //pin used to connect to potentiometer
int val;//variable used to read value from potentiometer
int pot = 1;
int center = 0;
int sweep = 0;
void setup() {
  // put your setup code here, to run once:
  myservo.attach(9);//attaches servo to pin 9 on the servo object
  Serial.begin(9600);//begin serial moniter, sets bodrate
}

void loop() {
  // put your main code here, to run repeatedly:
  pinMode(buttonpin, INPUT_PULLUP);
  buttonState = digitalRead(buttonpin);//read state of the button, make it active low
  if (pot == 1 && buttonState == HIGH){
    val = analogRead(potpin);//reads value of potentiometer
  val = map(val, 0, 1023, 1010, 2160);//scale it so servo can use
  myservo.writeMicroseconds(val);//sets servo pos using microseconds from val
  Serial.println(val);//print it
  delay(5);//delay
  }
  if (buttonState == LOW && pot == 1){
     delay(10);
     pot = 0;
     center = 1;
     Serial.println("center");
     delay(10);
    myservo.writeMicroseconds(1585);
    center = 0;
  }
  
  if (center == 0 && buttonState == LOW && pot == 0){
    sweep = 1;
    Serial.print("sweep");
  }

while (sweep == 1 && buttonState == HIGH && pot == 0){
    for (val = 1010, sweep == 1; val < 2160; val = val + 5){
      myservo.writeMicroseconds(val);
      Serial.println(val);
      delay(15);
      if (buttonState == LOW){
        sweep = 0;
        pot = 1;
      }
    }
    delay(50);
    for (val = 2160, sweep == 1; val > 1010; val = val - 5){
      myservo.writeMicroseconds(val);
      Serial.println(val);
      delay(15);
      if (buttonState == LOW){
        sweep = 0;
        pot = 1;
        Serial.println("pot");
      }
    }
   delay(50);
  }
 }