#include <Adafruit_NeoPixel.h>
#define LED_PIN    6
#define LED_COUNT 9

#define VERT_PIN A0
#define HORZ_PIN A1
#define SEL 12

const int contPix[] = {1, 1};
Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  // put your setup code here, to run once:
  pinMode(VERT_PIN, INPUT);
  pinMode(HORZ_PIN, INPUT);
  pinMode(SEL, INPUT_PULLUP);
  strip.begin();           // INITIALIZE NeoPixel strip object (REQUIRED)
  strip.show();            // Turn OFF all pixels ASAP
  strip.setBrightness(50);
}

void loop() {
  // put your main code here, to run repeatedly:
    int *ptr = (int*)contPix;
  const uint8_t o = (0, 0, 0);
  const uint8_t r = (255, 0, 0);
  int vert = analogRead(VERT_PIN);
  int horz = analogRead(HORZ_PIN);
  bool selPressed = digitalRead(SEL) == LOW;
  if ((vert >= 1023) && (ptr[1] > 2)) {
    ptr[1] += 1;
  } else if ((vert <= 0) && (ptr[1] < 0)) {
    ptr[1] -= 1;
  }
  if ((horz >= 1023) && (ptr[0] > 2)) {
    ptr[0] += 1;
  } else if ((horz <= 0) && (ptr[0] < 0)) {
    ptr[0] -= 1;
  }
  if (selPressed == true) {
    ptr[0] = 1;
    ptr[1] = 1;
  }
  /*
  for (int i = 0; i<strip.numPixels(); i++) {
    strip.setPixelColor(i, o);
    strip.show();
  }
  */
  strip.setPixelColor((ptr[0]+3*ptr[1]), r);
  strip.show();
}