int dt_pin = 3;
int clk_pin = 2;
int clk_old = 0;
int cnt = 0;

void setup() {
  Serial.begin(9600);
  pinMode(dt_pin, INPUT);
  pinMode(clk_pin, INPUT);  

}

void loop() {
  int dt = digitalRead(dt_pin);
  int clk = digitalRead(clk_pin);
  if(clk != clk_old)
  {
    if(clk != dt)
    {
      Serial.print("Direction: ");
      Serial.print("Clockwise");
      cnt++;
      Serial.println(" ");
      Serial.println(cnt);
    }
    if(clk == dt)
    {
      Serial.print("Direction: ");
      Serial.print("Anti-Clockwise");
      cnt--;
      Serial.println(" ");
      Serial.println(cnt);
    }
  }
  clk_old = clk;
}