#include <Servo.h>
#include <Adafruit_NeoPixel.h>

#define numPixels 60
#define CLK 2
#define DT 3
#define SW 4

Adafruit_NeoPixel screen(numPixels, 21);
Servo watch;

uint64_t w = 0;
uint64_t s = 0;



void setup() {

  screen.begin();
  pinMode(CLK, INPUT);
  pinMode(DT, INPUT);
  pinMode(SW, INPUT_PULLUP);
  int interruptNumber = digitalPinToInterrupt(CLK);

  watch.attach(9);
  attachInterrupt(interruptNumber, EncHandler, FALLING);
  watch.write(0);
  screen.setPixelColor(0, 255, 0, 0);
  screen.show();
  screen.clear();

}

void EncHandler() {
  if (digitalRead(DT) == HIGH) {
    s++;
    w += 7;
    watch.write(w);
    screen.setPixelColor(s, 255, 0, 0);
    screen.show();

    screen.clear();
  }  else {
    if (s != 0) {
      s--;
      w -= 7;
      watch.write(w);
      screen.setPixelColor(s, 255, 0, 0);
      screen.show();
      screen.clear();
    }
  }
}



void loop() {
  if (digitalRead(SW) == LOW) {
    watch.write(180);
    screen.setPixelColor(30, 255, 0, 0);
    screen.show();
    screen.clear();
    delay(435);
    watch.write(0);
    screen.setPixelColor(0, 255, 0, 0);
    screen.show();
    screen.clear();
  }
}