#include <Servo.h>
Servo myservo;
const int pbleft2 = 2;
const int pboff = 3;
const int pbright = 4;
const int servo = 13;

void setup(){
  pinMode(pbleft, INPUT_PULLUP);
    pinMode(pboff, INPUT_PULLUP);
      pinMode(pbright, INPUT_PULLUP);
        myservo.attach(servo);
        }
        void loop(){
         if (digitalRead(pbleft) == LOW){
         myservo.write(0);//reverse
          }
           else if (digitalRead(pboff) == LOW){
             myservo.write(90);//off
              }
               else if (digitalRead(pbright) == LOW){
                 myservo.write(180);//forward
                  }