#include <Servo.h>

Servo mymotor;
int potval;
int serot;
int buttonstate;

void delayfunct(int n){
    while(buttonstate==0){
      delay(100);
      buttonstate= digitalRead(2);
    }
}

void setup() {
  // put your setup code here, to run once:
  mymotor.attach(9);//only to PWM
  mymotor.write(0);
  pinMode(2, INPUT_PULLUP);
  delay(1000);
}

void loop() {
  // put your main code here, to run repeatedly:
  buttonstate=digitalRead(2);

  
  for(int i=0;i<181;i++){
    buttonstate=digitalRead(2);
    mymotor.write(i);
    delay(5);
    if(buttonstate==0){
        delayfunct(buttonstate);
    }
  }


  for(int j=180;j>-1;j--){
      buttonstate=digitalRead(2);
     mymotor.write(j);
     delay(5);
     if(buttonstate==0){
      delayfunct(buttonstate);
    }
  }


}