#include <Servo.h>
Servo myservo;
int pos = 0;


int clk=9;
int dt=8;
int rotpos=90;
int current=0;
int before=0;
int lr=0;
int left=1;
int right=-1;
int sw=7;
int csw=0;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(clk, INPUT);
  pinMode(dt, INPUT);
  pinMode(sw, INPUT_PULLUP);
  before = digitalRead(clk);
  myservo.attach(4);
}


void loop() {
  // put your main code here, to run repeatedly:
  csw=digitalRead(sw);
  current=digitalRead(clk);
  if(current != before){
    if(digitalRead(dt)!=current){
      rotpos+=4;
      lr=right;

      }
      else{
        rotpos-=4;
        lr=left;
      }

      if(lr==left){
       Serial.print("LEFT ");
        Serial.print(rotpos);
         Serial.println("");
      }else{
        Serial.print("RIGHT ");
         Serial.print(rotpos);
         Serial.println("");
      }
      if(rotpos > 180) rotpos=180;
      if(rotpos < 0) rotpos=0;



    }
 before=current;
 if(csw == 0){
      myservo.write(rotpos);
          delay(15);
 }
}