#include <Servo.h>
int p1= 3;
int p2 = 4;
int ava;
int ind;
int i=0;
Servo s1;
int start_pos=0;
void setup() {
  Serial.begin(115200);
  s1.attach(8);
  s1.write(start_pos);
  pinMode(p1, INPUT_PULLUP);
  pinMode(p2, INPUT_PULLUP);
  int ava = digitalRead(p1);
  int ind = digitalRead(p2);
  // put your setup code here, to run once:

}

void forward() {
  s1.write(i);
}

void rear() {
  s1.write(i);
}

void loop() {
  int ava = digitalRead(p1);
  int ind = digitalRead(p2);
  Serial.print(i);
  delay(10);
  if ((i<180) && (!ava)){
    i= i +1;
    forward();
  }
  else if ((i> 0) && (!ind)){
    i = i - 1;
    rear();
  }
}