#include <Servo.h>

Servo myServo;
const int pb1 = 7;
const int pb2 = 6;
int pos = 90;
int pb1_state, pb2_state;

void setup() {
  Serial.begin(9600);
  myServo.attach(5);
  pinMode(pb1, INPUT);
  pinMode(pb2, INPUT);
  myServo.write(pos);
}

void loop() {
  pb1_state = digitalRead(pb1); 
  pb2_state = digitalRead(pb2); 
  Serial.println(pb1_state);
  Serial.println(pb2_state);

  if (pb1_state == HIGH) {
    if (pos > 0) {
      pos -= 1;
      myServo.write(pos);
      delay(10);
    }
  } 
  else if (pb2_state == HIGH) {
    if (pos < 180) {
      pos += 1;
      myServo.write(pos);
      delay(10);
    }
  }
}